Faculty Profiles - INAMI, Kenji

Papers - INAMI, Kenji

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Search for two-body B meson decays to Λ0 and ωc (∗)0 Reviewed International coauthorship

Savinov V., Adachi I., Ahn J.K., Aihara H., Asner D.M., Atmacan H., Ayad R., Banerjee S., Bennett J., Bessner M., Bhardwaj V., Biswas D., Bobrov A., Bodrov D., Borah J., Bračko M., Branchini P., Browder T.E., Budano A., Červenkov D., Chang M.C., Chang P., Cheon B.G., Cho K., Choi S.K., Choi Y., Choudhury S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dubey S., Ecker P., Epifanov D., Farino M., Ferlewicz D., Fulsom B.G., Gaur V., Giri A., Goldenzweig P., Graziani E., Gu T., Guan Y., Gudkova K., Hadjivasiliou C., Hayashii H., Hazra S., Hedges M.T., Hou W.S., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jin Y., Kalita D., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kinoshita K., Kodyš P., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kuhr T., Kumar R., Kumita T., Kuzmin A., Kwon Y.J., Lai Y.T., Lam T., Lange J.S., Li L.K., Li Y., Li Y.B., Li Gioi L., Libby J., Liventsev D., Luo T., Ma Y., Masuda M., Matsuda T., Maurya S.K., Meier F., Merola M., Nakamura I., Nakao M., Natkaniec Z., Nayak L., Nayak M., Nishida S., Ogawa S., Ono H.

Physical Review D Vol. 110 ( 3 ) 2024.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D

We report the results of the first search for Standard Model and baryon-number-violating two-body decays of the neutral B mesons to Λ0 and ωc(∗)0 using 711 fb-1 of data collected at the Gamma;(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe no evidence of signal from any such decays and set 95% confidence-level upper limits on the products of B0 and B¯0 branching fractions for these two-body decays with B(ωc0→π+ω-) in the range between 9.5×10-8 and 31.2×10-8.

DOI： 10.1103/PhysRevD.110.L031102

Scopus

Measurement of the branching fractions of B¯ → D(*)K−KS∗0 and B¯ → D(*)Ds− decays at Belle II Reviewed

Adachi I., Aggarwal L., Aihara H., Akopov N., Aloisio A., Althubiti N., Anh Ky N., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhuyan B., Bianchi F., Bierwirth L., Bilka T., Biswas D., Bobrov A., Bodrov D., Bolz A., Boschetti A., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campagna Q., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheema P., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Corona L., Cui J.X., Dattola F., De La Cruz-Burelo E., De La Motte S.A., de Marino G., De Nardo G., De Nuccio M., De Pietro G., de Sangro R., Destefanis M., Dey S., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., Doležal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dorner D., Dort K., Dossett D., Dreyer S., Dubey S., Dugic K., Dujany G., Ecker P., Eliachevitch M., Epifanov D., Feichtinger P., Ferber T., Fillinger T., Finck C., Finocchiaro G.

Journal of High Energy Physics Vol. 2024 ( 8 ) 2024.8

Language：English Publisher：Journal of High Energy Physics

We present measurements of the branching fractions of eight B¯0 → D(*)+K−KS∗0, B− → D(*)0K−KS∗0 decay channels. The results are based on data from SuperKEKB electron-positron collisions at the Υ(4S) resonance collected with the Belle II detector, corresponding to an integrated luminosity of 362 fb−1. The event yields are extracted from fits to the distributions of the difference between expected and observed B meson energy, and are efficiency-corrected as a function of m(K−KS∗0) and m(D(*)KS∗0) in order to avoid dependence on the decay model. These results include the first observation of B¯0 → D+K−KS0, B− → D*0K−KS0, and B¯0 → D*+K−KS0 decays and a significant improvement in the precision of the other channels compared to previous measurements. The helicity-angle distributions and the invariant mass distributions of the K−KS∗0 systems are compatible with quasi-two-body decays via a resonant transition with spin-parity JP = 1− for the K−KS0 systems and JP = 1+ for the K−K*0 systems. We also present measurements of the branching fractions of four B¯0 → D(*)+Ds−, B− → D(*)0Ds− decay channels with a precision compatible to the current world averages.

DOI： 10.1007/JHEP08(2024)206

Scopus

Test of light-lepton universality in τ decays with the Belle II experiment Reviewed

Adachi I., Adamczyk K., Aggarwal L., Aihara H., Akopov N., Aloisio A., Anh Ky N., Asner D.M., Atmacan H., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bianchi F., Bierwirth L., Bilka T., Bilokin S., Biswas D., Bobrov A., Bodrov D., Bolz A., Borah J., Boschetti A., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheaib R., Cheema P., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Corona L., Cui J.X., Das S., Dattola F., De La Cruz-Burelo E., De La Motte S.A., de Marino G., De Nardo G., De Nuccio M., De Pietro G., de Sangro R., Destefanis M., Dey S., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., Doležal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dorner D., Dort K., Dossett D., Dreyer S., Dubey S., Dugic K., Dujany G., Ecker P., Eliachevitch M., Epifanov D., Feichtinger P., Ferber T., Ferlewicz D., Fillinger T., Finck C.

Journal of High Energy Physics Vol. 2024 ( 8 ) 2024.8

Language：English Publisher：Journal of High Energy Physics

We present a measurement of the ratio Rμ=Bτ−→μ−ν¯μντ/Bτ−→e−ν¯eντ of branching fractions B of the τ lepton decaying to muons or electrons using data collected with the Belle II detector at the SuperKEKB e+e− collider. The sample has an integrated luminosity of 362 ± 2 fb−1 at a centre-of-mass energy of 10.58 GeV. Using an optimised event selection, a binned maximum likelihood fit is performed using the momentum spectra of the electron and muon candidates. The result, Rμ = 0.9675 ± 0.0007 ± 0.0036, where the first uncertainty is statistical and the second is systematic, is the most precise to date. It provides a stringent test of the light-lepton universality, translating to a ratio of the couplings of the muon and electron to the W boson in τ decays of 0.9974 ± 0.0019, in agreement with the standard model expectation of unity.

DOI： 10.1007/JHEP08(2024)205

Scopus

New graph-neural-network flavor tagger for Belle II and measurement of sin 2φ1 in B0 →J/ψ K S0 decays Reviewed

Adachi I., Aggarwal L., Ahmed H., Aihara H., Akopov N., Aloisio A., Anh Ky N., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhuyan B., Bianchi F., Bierwirth L., Bilka T., Bilokin S., Biswas D., Bobrov A., Bodrov D., Bolz A., Bondar A., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheema P., Chen C., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Corona L., Das S., Dattola F., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Nuccio M., De Pietro G., De Sangro R., Destefanis M., Dey S., Dhamija R., Di Canto A., Di Capua F., DoleŽal Z., Dong T.V., Dorigo M., Dort K., Dossett D., Dreyer S., Dubey S., Dujany G., Ecker P., Eliachevitch M., Feichtinger P., Ferber T., Ferlewicz D., Fillinger T., Finck C., Finocchiaro G., Fodor A., Forti F., Frey A.

Physical Review D Vol. 110 ( 1 ) 2024.7

Language：English Publisher：Physical Review D

We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral B mesons produced in ϒ(4S) decays. It improves previous algorithms by using the information from all charged final-state particles and the relations between them. We evaluate its performance using B decays to flavor-specific hadronic final states reconstructed in a 362 fb-1 sample of electron-positron collisions collected at the ϒ(4S) resonance with the Belle II detector at the SuperKEKB collider. We achieve an effective tagging efficiency of (37.40±0.43±0.36%), where the first uncertainty is statistical and the second systematic, which is 18% better than the previous Belle II algorithm. Demonstrating the algorithm, we use B0→J/ψKS0 decays to measure the mixing-induced and direct CP violation parameters, S=(0.724±0.035±0.009) and C=(-0.035±0.026±0.029).

DOI： 10.1103/PhysRevD.110.012001

Scopus

Evidence for B+ →k+ν ν ¯ decays Reviewed

Adachi I., Adamczyk K., Aggarwal L., Ahmed H., Aihara H., Akopov N., Aloisio A., Anh Ky N., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Baudot J., Bauer M., Baur A., Beaubien A., Becherer F., Becker J., Behera P.K., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhuyan B., Bianchi F., Bilka T., Biswas D., Bobrov A., Bodrov D., Bolz A., Borah J., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheaib R., Cheema P., Chekelian V., Chen C., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Corona L., Cremaldi L.M., Cunliffe S., Das S., Dattola F., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Nuccio M., De Pietro G., De Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., DoleŽal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dort K., Dossett D., Dreyer S., Dubey S., Dujany G., Ecker P., Eliachevitch M., Epifanov D., Fan Y.

Physical Review D Vol. 109 ( 11 ) 2024.6

Language：English Publisher：Physical Review D

We search for the rare decay B+→K+νν¯ in a 362 fb-1 sample of electron-positron collisions at the δ (4S) resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying B meson in δ (4S)→BB¯ events to suppress background from other decays of the signal B candidate and light-quark pair production. We validate the measurement with an auxiliary analysis based on a conventional hadronic reconstruction of the accompanying B meson. For background suppression, we exploit distinct signal features using machine learning methods tuned with simulated data. The signal-reconstruction efficiency and background suppression are validated through various control channels. The branching fraction is extracted in a maximum likelihood fit. Our inclusive and hadronic analyses yield consistent results for the B+→K+νν¯ branching fraction of [2.7±0.5(stat)±0.5(syst)]×10-5 and [1.1-0.8+0.9(stat)-0.5+0.8(syst)]×10-5, respectively. Combining the results, we determine the branching fraction of the decay B+→K+νν¯ to be [2.3±0.5(stat)-0.4+0.5(syst)]×10-5, providing the first evidence for this decay at 3.5 standard deviations. The combined result is 2.7 standard deviations above the standard model expectation.

DOI： 10.1103/PhysRevD.109.112006

Scopus

Search for a heavy neutral lepton that mixes predominantly with the tau neutrino Reviewed

Nayak M., Dey S., Soffer A., Adachi I., Aihara H., Al Said S., Asner D.M., Atmacan H., Ayad R., Babu V., Banerjee S., Bauer M., Behera P., Belous K., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Biswas D., Bobrov A., Bodrov D., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Cheon B.G., Cho H.E., Cho K., Choi Y., Choudhury S., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Dubey S., Ecker P., Epifanov D., Ferber T., Fogel O., Fulsom B.G., Gaur V., Giri A., Goldenzweig P., Graziani E., Gudkova K., Hadjivasiliou C., Halder S., Hara T., Hayasaka K., Hayashii H., Hazra S., Hedges M.T., Herrmann D., Hou W.S., Hsu C.L., Inami K., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jia S., Jin Y., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kinoshita K., Kodyš P., Korobov A., Korpar S., KriŽan P., Krokovny P., Kuhr T., Kumar D., Kumar R., Kuzmin A., Kwon Y.J., Lai Y.T., Lam T., Lange J.S., Laurenza M., Lee S.C., Li L.K., Li Y.B., Li Gioi L., Libby J., Lieret K., Lin Y.R., Liventsev D., Luo T., Ma Y., Masuda M., Maurya S.K.

Physical Review D Vol. 109 ( 11 ) 2024.6

Language：English Publisher：Physical Review D

We report a search for a heavy neutral lepton (HNL) that mixes predominantly with ντ. The search utilizes data collected with the Belle detector at the KEKB asymmetric energy e+e- collider. The data sample was collected at and just below the center-of-mass energies of the (4S) and (5S) resonances and has an integrated luminosity of 915 fb-1, corresponding to (836±12)×106 e+e-→τ+τ- events. We search for production of the HNL (denoted N) in the decay τ-→π-N followed by its decay via N→μ+μ-ντ. The search focuses on the parameter-space region in which the HNL is long-lived, so that the μ+μ- originate from a common vertex that is significantly displaced from the collision point of the KEKB beams. Consistent with the expected background yield, one event is observed in the data sample after application of all the event-selection criteria. We report limits on the mixing parameter of the HNL with the τ neutrino as a function of the HNL mass.

DOI： 10.1103/PhysRevD.109.L111102

Scopus

Measurement of the branching fraction of the decay B- →d0ρ (770)- at Belle II Reviewed

Adachi I., Aggarwal L., Aihara H., Akopov N., Aloisio A., Anh Ky N., Asner D.M., Atmacan H., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Baudot J., Baur A., Beaubien A., Becherer F., Becker J., Bennett J.V., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bianchi F., Bilka T., Biswas D., Bobrov A., Bodrov D., Bolz A., Bondar A., Boschetti A., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Cheema P., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Corona L., Cui J.X., Dattola F., De La Cruz-Burelo E., De La Motte S.A., De Marino G., De Nardo G., De Nuccio M., De Pietro G., De Sangro R., Destefanis M., Dey S., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., DoleŽal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dorner D., Dort K., Dossett D., Dreyer S., Dubey S., Dugic K., Dujany G., Ecker P., Eliachevitch M., Feichtinger P., Ferber T., Fillinger T., Finck C., Finocchiaro G., Fodor A., Forti F., Frey A., Fulsom B.G., Gabrielli A., Ganiev E., Garcia-Hernandez M.

Physical Review D Vol. 109 ( 11 ) 2024.6

Language：English Publisher：Physical Review D

We measure the branching fraction of the decay B-→D0ρ(770)- using data collected with the Belle II detector. The data contain 387 million BB¯ pairs produced in e+e- collisions at the ϒ(4S) resonance. We reconstruct 8360±180 decays from an analysis of the distributions of the B- energy and the ρ(770)- helicity angle. We determine the branching fraction to be (0.939±0.021(stat)±0.050(syst))%, in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two.

DOI： 10.1103/PhysRevD.109.L111103

Scopus

Measurement of CP asymmetries in B0 → KS0 KS0 KS0 decays at Belle II Reviewed

Adachi I., Aggarwal L., Ahmed H., Aihara H., Akopov N., Aloisio A., Anh Ky N., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Bansal S., Barrett M., Baudot J., Bauer M., Baur A., Beaubien A., Becherer F., Becker J., Behera P.K., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhuyan B., Bianchi F., Bierwirth L., Bilka T., Biswas D., Bobrov A., Bodrov D., Bolz A., Bondar A., Borah J., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheaib R., Cheema P., Chekelian V., Chen C., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Cochran J., Corona L., Cremaldi L.M., Das S., Dattola F., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Nuccio M., De Pietro G., De Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., DoleŽal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dort K., Dossett D., Dreyer S., Dubey S., Dujany G., Ecker P., Eliachevitch M., Epifanov D.

Physical Review D Vol. 109 ( 11 ) 2024.6

Language：English Publisher：Physical Review D

We report a measurement of decay-time-dependent charge-parity (CP) asymmetries in B0→KS0KS0KS0 decays. We use 387×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the CP-violating parameters S and C from a fit to the distribution of the decay-time difference between the two B mesons. The resulting confidence region is consistent with previous measurements in B0→KS0KS0KS0 and B0→(cc¯)K0 decays and with predictions based on the standard model.

DOI： 10.1103/PhysRevD.109.112020

Scopus

Measurement of branching-fraction ratios and CP asymmetries in B± → D<inf>CP±</inf>K± decays at Belle and Belle II Reviewed

Adachi I., Aggarwal L., Aihara H., Akopov N., Aloisio A., Anh Ky N., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Ayad R., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Barrett M., Baudot J., Bauer M., Baur A., Beaubien A., Becherer F., Becker J., Behera P.K., Belous K., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhuyan B., Bianchi F., Bilka T., Biswas D., Bobrov A., Bodrov D., Bolz A., Bondar A., Borah J., Bozek A., Bračko M., Branchini P., Briere R.A., Browder T.E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheema P., Chekelian V., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Choi S.K., Choi Y., Choudhury S., Cochran J., Corona L., Cremaldi L.M., Czank T., Das S., Dattola F., De La Cruz-Burelo E., De La Motte S.A., de Marino G., De Nardo G., De Nuccio M., De Pietro G., de Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., Doležal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dort K., Dossett D., Dreyer S., Dubey S., Dujany G., Ecker P., Eliachevitch M., Feichtinger P., Ferber T., Ferlewicz D.

Journal of High Energy Physics Vol. 2024 ( 5 ) 2024.5

Language：English Publisher：Journal of High Energy Physics

We report results from a study of B±→ DK± decays followed by D decaying to the CP-even final state K+K− and CP-odd final state KS0π0, where D is an admixture of D0 and D¯0 states. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity-triangle angle ϕ3. The results are based on a combined analysis of the final data set of 772 × 106BB¯ pairs collected by the Belle experiment and a data set of 198 × 106BB¯ pairs collected by the Belle II experiment, both in electron-positron collisions at the Υ(4S) resonance. We measure the CP asymmetries to be ACP+ = (+12.5 ± 5.8 ± 1.4)% and ACP− = (−16.7 ± 5.7 ± 0.6)%, and the ratios of branching fractions to be RCP+ = 1.164 ± 0.081 ± 0.036 and RCP− = 1.151 ± 0.074 ± 0.019. The first contribution to the uncertainties is statistical, and the second is systematic. The asymmetries ACP+ and ACP− have similar magnitudes and opposite signs; their difference corresponds to 3.5 standard deviations. From these values we calculate 68.3% confidence intervals of (8.5° < ϕ3 < 16.5°) or (84.5° < ϕ3 < 95.5°) or (163.3° < ϕ3 < 171.5°) and 0.321 < rB < 0.465.

DOI： 10.1007/JHEP05(2024)212

Scopus

Search for the e+e- →ηb (1S)ω and e+e- →χb0 (1P)ω processes at s =10.745 GeV Reviewed

Adachi I., Aggarwal L., Ahmed H., Aihara H., Akopov N., Aloisio A., Anh Ky N., Asner D.M., Atmacan H., Aushev T., Aushev V., Aversano M., Babu V., Bae H., Bahinipati S., Bambade P., Banerjee S., Barrett M., Baudot J., Bauer M., Baur A., Beaubien A., Becherer F., Becker J., Behera P.K., Bennett J.V., Bernlochner F.U., Bertacchi V., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhuyan B., Bianchi F., Bilka T., Bilokin S., Biswas D., Bobrov A., Bodrov D., Bolz A., Bondar A., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cerasoli J., Chang M.C., Chang P., Cheaib R., Cheema P., Cheon B.G., Chilikin K., Chirapatpimol K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choudhury S., Corona L., Das S., Dattola F., De La Cruz-Burelo E., De La Motte S.A., De Nardo G., De Nuccio M., De Pietro G., De Sangro R., Destefanis M., Dhamija R., Di Canto A., Di Capua F., Dingfelder J., DoleŽal Z., Domínguez Jiménez I., Dong T.V., Dorigo M., Dort K., Dossett D., Dreyer S., Dubey S., Dujany G., Ecker P., Eliachevitch M., Epifanov D., Feichtinger P., Ferber T., Ferlewicz D., Fillinger T., Finocchiaro G., Fodor A., Forti F., Frey A., Fulsom B.G.

Physical Review D Vol. 109 ( 7 ) 2024.4

Language：English Publisher：Physical Review D

We search for the e+e-→ηb(1S)ω and e+e-→χb0(1P)ω processes at a center-of-mass energy of 10.745 GeV, which is close to the peak of the (10753) state. We use data collected by the Belle II experiment during a special run, corresponding to an integrated luminosity of 9.8 fb-1. We reconstruct ω→π+π-π0 decays and use the ω meson's recoil mass to search for the signals. We do not find evidence for either process, and set upper limits on the corresponding Born-level cross sections of 2.5 pb and 7.8 pb, respectively, at the 90% confidence level. The χb0(1P)ω limit is the result of a combination of this analysis and a previous search using full reconstruction.

DOI： 10.1103/PhysRevD.109.072013

Scopus

Determination of the CKM angle $\phi_{3}$ from a combination of Belle and Belle II results Reviewed International journal

Ichiro Adachi, Latika Aggarwal, Hiroaki Aihara, Akopov, Alberto Aloisio, S. Al Said, Nguyen Anh Ky, David Asner, Hulya Atmacan, Volodymyr Aushev, Michele Aversano, Rachid Ayad, Varghese Babu, Hanwook Bae, Seema Bahinipati, Philip BAMBADE, swagato banerjee, Sunil Bansal, Matthew Barrett, Jerome Baudot, Anselm Baur, Alexandre Beaubien, Fabian Becherer, Jürgen Becker, Konstantin Belous, Jake Bennett, Florian Bernlochner, Valerio Bertacchi, Michel Bertemes, Emilie Bertholet, Martin Bessner, Stefano Bettarini, BIPUL BHUYAN, Fabrizio Bianchi, Lukas Bierwirth, Tadeas Bilka, Sviatoslav Bilokin, Diptaparna Biswas, Alexander Bobrov, Denis Bodrov, Arthur Eugen Bolz, Alexander Bondar, Andrzej Bożek, Marko Bračko, Paolo Branchini, Roy A. Briere, Thomas E Browder, Antonio Budano, Severino Bussino, Marcello Campajola, Lu Cao, Giulia Casarosa, Claudia Cecchi, Jacopo Cerasoli, M.-C. Chang, PAO-TI CHANG, Racha Cheaib, Priyanka Cheema, ByungGu Cheon, Kirill Chilikin, Khem Chirapatpimol, 한얼 조, Kihyeon Cho, S. -K. Choi, YOUNG-IL CHOI, Seema Choudhury, LUIGI CORONA, Sanjeeda Bharati Das, Filippo Dattola, Eduard De La Cruz Burelo, Shanette De La Motte, Gaetano de Marino, Guglielmo De Nardo, Michael De Nuccio, Giacomo De Pietro, Riccardo de Sangro, Marco Giovanni Maria Destefanis, Rashmi Dhamija, Angelo Di Canto, Francesco Di Capua, Jochen Dingfelder, Zdeněk Doležal, T. V. Dong, Mirco Dorigo, Katharina Dort, David Dossett, Sascha Dreyer, Shawn Dubey, Giulio Dujany, Patrick Ecker, Michael Eliachevitch, Denis Epifanov, Paul Feichtinger, Torben Ferber, Daniel Ferlewicz, Tristan Fillinger, Giuseppe Finocchiaro, Andrea Fodor, Francesco Forti, Ariane Frey, Bryan FULSOM, alice gabrielli, ELDAR GANIEV, Marcela García Hernández, Renu, Giovanni Gaudino, Vipin Gaur, Alessandro Gaz, Andreas Gellrich, Gayane Ghevondyan, Debjit Ghosh, Hazaravard Ghumaryan, Georgios Giakoustidis, Raffaele Giordano, Anjan Giri, Benigno Gobbo, Dr. Romulus Godang, Olga Gogota, Pablo Goldenzweig, Wolfgang Gradl, Thomas Grammatico, Svenja Granderath, Enrico Graziani, Daniel Greenwald, Zuzana Gruberová, T. Gu, Yinghui Guan, Kristina Gudkova, Soumen Halder, Yubo Han, Takanori HARA, Hisaki Hayashii, SAGAR HAZRA, Michael Thomas Hedges, Alexander Heidelbach, I. Heredia de la Cruz, Michel Enrique Hernández Villanueva, Takeo Higuchi, Matthias Hoek, Marcel Hohmann, Philipp Horak, Chia-Ling Hsu, Thibaud Humair, Toru Iijima, Kenji Inami, N Sushree Ipsita, A. Ishikawa, Ryosuke Itoh, Masako Iwasaki, Paul Jackson, W. W. Jacobs, Eunji Jang, Qingping Ji, Sen Jia, Yifan Jin, Henrik Junkerkalefeld, Dibyajyoti Kalita, Abdul Basith Kaliyar, Jakub Kandra, Takeo Kawasaki, Felix Keil, Christian Kiesling, Cheolhun Kim, Doris Yangsoo Kim, Kyungho KIM, Yongkyu kim, Haruki Kindo, Kay Kinoshita, Peter Kodyš, Taichiro Koga, Shahab Kohani, Kazuki Kojima, Alexandr Korobov, Samo Korpar, Evgeniy Kovalenko, R.V. Kowalewski, Thomas Kraetzschmar, Peter Križan, Pavel Krokovny, Thomas Kuhr, Jitendra Kumar, Manish Kumar, R.Kumar, Rajeev Kumar Sharma, Sharma R K, Kospalage kumara, Takuto Kunigo, Alexander Kuzmin, Young-Joon Kwon, Stefano Lacaprara, Yun-Tsung Lai, Tommy Lam, Livio Lanceri, Jens Sören Lange, Martina Laurenza, Myeong Jae Lee, Dmytro Levit, Peter M Lewis, Chunhua Li, Longke Li, Yang Li, Yubo Li, James Libby, Meihong LIU, Qingyuan LIU, Z. Q. Liu & Zhiqing Liu, Dmitri Liventsev, Savino Longo, Thomas Lueck, Chaoyi Lyu, Y. Ma, Marco Maggiora, Swarna Prabha Maharana, Rajesh Kumar MAITI, Souvik Maity, Giampiero Mancinelli, Riccardo Manfredi, Elisa Manoni, Michele Mantovano, Daniel Marcantonio, Simonetta Marcello, Carlos Marinas, Lucas Martel, Cristina Martellini, Alberto Martini, Tommy Martinov, Ludovico Massaccesi, Masataka Masuda, Dmitry Matvienko, Shubhangi Krishan Maurya, Janis McKenna, Rishabh Mehta, Frank Meier, Mario Merola, Felix Metzner, Caleb Miller, Marco Mirra, Kenkichi Miyabayashi, Hideki Miyake, Gagan B. Mohanty, Norman Molina, Suryanarayan Mondal, Stefano Moneta, Hans-Günther Moser, Manca Mrvar, Roberto Mussa, isamu nakamura, Katsuro Nakamura, Mikihiko Nakao, Yu Nakazawa, Megumi Naruki, Devender Kumar, Zbigniew Natkaniec, Andrii Natochii, Lopamudra Nayak, M. Nayak, Gevorg Nazaryan, Marc Neu, Carsten Niebuhr, Shohei Nishida, Satoru Ogawa, Yuriy Onishchuk, Hiroaki Ono, Pavel Oskin, Fumiaki OTANI, Pavel Pakhlov, Galina Pakhlova, Anil Panta, Silvio Pardi, Katherine Parham, Hwanbae Park, Seokhee Park, antonio passeri, Sourav Patra, Stephan Paul, Todd Pedlar, Richard Peschke, Rok Pestotnik, Marcello Piccolo, Leo Piilonen, Gianluca Pinna Angioni, Pedro Podesta, Tomaž Podobnik, Saroj Pokharel, Cyrille Praz, Soeren Prell, Elisabetta Prencipe, Markus Tobias Prim, Harsh Purwar, Petar Rados, Géraldine Räuber, Sebastiano Raiz, Noreen Rauls, Markus Reif, Simon Reiter, Mikhail Remnev, Isabelle Ripp-Baudot, Giuliana Rizzo, Steven Robertson, Markus Röhrken, J.M.Roney, Armine Rostomyan, N. Rout, Guido Russo, David Sanders, Saurabh Sandilya, Luka Santelj, Yo Sato, Vladimir Savinov, Bianca Scavino, Caspar Schmitt, Gunar Schnell, Christoph Schwanda, Marike Schwickardi, Yoshiaki Seino, andrea selce, Katsumi Senyo, justine serrano, Martin Sevior, Concettina Sfienti, Wei Shan, Xiaodong Shi, Trevor Shillington, Tomoyuki Shimasaki, Jing-Ge Shiu, Dmitry Shtol, Boris Shwartz, Alexei Sibidanov, Frank Simon, J.B. Singh, Justin Skorupa, Randall Sobie, Martin Sobotzik, Abner Soffer, Anatoly Sokolov, Elena Solovieva, Stefano Spataro, Björn Spruck, Staric Marko, Petros Stavroulakis, Slavomira Stefkova, Roberto Stroili, Mizuki Sumihama, 一高住澤, William Sutcliffe, narumon suwonjandee, Makoto Takizawa, umberto tamponi, Kiyoshi Tanida, Francesco Tenchini, Oskar Tittel, Rahul Tiwary, Diego Tonelli, Ezio Torassa, Karim Trabelsi, Ilias Tsaklidis, Makoto Uchida, Ikuo Ueda, Yuma Uematsu, Timofey Uglov, Kai Lukas Unger, Yuuji Unno, Kenta Uno, SHOJI UNO, PHILLIP URQUIJO, Yutaka USHIRODA, Sven Vahsen, Raynette van Tonder, Kevin Varvell, Michele Veronesi, Anna Vinokurova, Vismaya V S, Lorenzo Vitale, Vidya Sagar Vobbilisetti, Roberta Volpe, Benedikt Wach, Miho Wakai, Stefan Wallner, E. Wang, MIN-ZU WANG, Xiaolong Wang, Zihan Wang, Andreas Warburton, Shun Watanuki, Christian, Eunil Won, Xinping Xu, Bruce Yabsley, Satoru Yamada, Wenbiao Yan, Seongbae Yang, John Yelton, Junhao Yin, Keisuke Yoshihara, Chang-Zheng Yuan, Boyang Zhang, Y.Zhang, Victor Zhilich, Qidong Zhou, Valentina Zhukova

JHEP Vol. 10 page： 143 - 143 2024.4

Search for the semileptonic decays <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Ξ</mml:mi><mml:mi>c</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi mathvariant="normal">Ξ</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>−</mml:mo></mml:msup></mml:math> at Belle Reviewed

J. X. Cui, Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, S. Dubey, P. Ecker, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, S. Hazra, D. Herrmann, W.-S. Hou, C.-L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Kalita, C. Kiesling, D. Y. Kim, K.-H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, T. Kuhr, D. Kumar, R. Kumar, Y.-J. Kwon, T. Lam, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, Y. Ma, M. Masuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, K. Miyabayashi, R. Mizuk, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, J. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, M. T. Prim, N. Rout, G. Russo, S. Sandilya, L. Santelj, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, W. Shan, C. Sharma, J.-G. Shiu, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, M. Takizawa, K. Tanida, F. Tenchini, R. Tiwary, T. Uglov, Y. Unno, S. Uno, Y. Usov, A. Vinokurova, M.-Z. Wang, S. Watanuki, E. Won, B. D. Yabsley, W. Yan, J. Yelton, J. H. Yin, L. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova

Physical Review D Vol. 109 ( 5 ) 2024.3

Search for baryon and lepton number violating decays D →pℓ Reviewed

S. Maity, R. Garg, S. Bahinipati, V. Bhardwaj, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, M. Bauer, J. Bennett, M. Bessner, D. Biswas, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, M. Bračko, P. Branchini, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, S. Das, N. Dash, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, T. V. Dong, P. Ecker, D. Epifanov, T. Ferber, B. G. Fulsom, V. Gaur, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, S. Hazra, W. S. Hou, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, Y. Jin, D. Kalita, C. Kiesling, C. H. Kim, D. Y. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, T. Lam, S. C. Lee, D. Levit, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, D. Narwal

Physical Review D Vol. 109 ( 3 ) 2024.2

Language：English Publishing type：Research paper (scientific journal)

We search for the baryon and lepton number violating charm decays, D→pℓ, where D is either a D0 or a D¯0 and ℓ is a muon or an electron, using a data sample of 921 fb-1 collected by the Belle detector at the KEKB asymmetric energy e+e- collider. In the absence of significant signals, we set upper limits on the branching fractions in the range (5-8)×10-7 at a 90% confidence level, depending on the decay mode.

DOI： 10.1103/PhysRevD.109.L031101

Scopus

Search for a dark leptophilic scalar produced in association with τ+τ- pair in e+e- annihilation at center-of-mass energies near 10.58 GeV Reviewed

D. Biswas, Sw Banerjee, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Dubey, P. Ecker, D. Epifanov, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, S. Hazra, M. T. Hedges, D. Herrmann, M. Hernández Villanueva, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. J. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, P. KriŽan, P. Krokovny, M. Kumar, K. Kumara, Y. J. Kwon, Y. T. Lai, M. Laurenza, S. C. Lee, D. Levit, J. Li, L. K. Li, Y. Li, L. Li Gioi, J. Libby, K. Lieret, Y. R. Lin

Physical Review D Vol. 109 ( 3 ) 2024.2

Language：English Publishing type：Research paper (scientific journal)

A dark leptophilic scalar (φL) is a hypothetical particle that couples only to leptons rather than quarks. We report on a search for φL in the e+e-→τ+τ-φL, φL→ℓ+ℓ-(ℓ=e,μ) process using 626 fb-1 of data collected by the Belle experiment near the ϒ(4S) resonance. We validate the backgrounds with multiple control regions in data, using a novel multiclass multivariate event classifier. In absence of a signal, we quote upper limits at the 90% confidence level on the coupling between φL and leptons. Our bounds, obtained in a blinded approach, are 19% more constraining than the previous limits, averaged over the mass range 0.04≤mφL≤6.5 GeV. We exclude the parameter space below 4 GeV favored by measurement of the anomalous magnetic moment of the muon.

DOI： 10.1103/PhysRevD.109.032002

Scopus

Search for charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays at Belle Reviewed

Vol. 2024 ( 2 ) 2024.2

Measurement of branching fractions and direct CP asymmetries for B →Kπ and B →ππ decays at Belle II Reviewed

Vol. 109 ( 1 ) 2024.1

Study of B+ →p n ¯ π0 Reviewed

Vol. 108 ( 11 ) 2023.12

Observation of charmed strange meson pair production in ϒ (2S) decays and in e+e- annihilation at s =10.52 GeV Reviewed

Vol. 108 ( 11 ) 2023.12

Search for a long-lived spin-0 mediator in b →s transitions at the Belle II experiment Reviewed

Vol. 108 ( 11 ) 2023.12

Search for CP violation in D (s)+ →k+ KS0 h+h- (h=K, π) decays and observation of the Cabibbo-suppressed decay Ds+ →k+K- KS0 π+ Reviewed

Vol. 108 ( 11 ) 2023.12

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