Faculty Profiles - IIJIMA, Toru

Papers - IIJIMA, Toru

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The Belle II Physics Book (Dec, 10.1093/ptep/ptz106, 2019)

Kou E, Urquijo P, Altmannshofer W, Beaujean F, Bell G, Beneke M, Bigi I. I, Bishara F, Blanke M, Bobeth C, Bona M, Brambilla N, Braun V. M, Brod J, Buras A. J, Cheng H. Y, Chiang C. W, Ciuchini M, Colangelo G, Crivellin A, Czyz H, Datta A, De Fazio F, Deppisch T, Dolan M. J, Evans J, Fajfer S, Feldmann T, Godfrey S, Gronau M, Grossman Y, Guo F. K, Haisch U, Hanhart C, Hashimoto S, Hirose S, Hisano J, Hofer L, Hoferichter M, Hou W. S, Huber T, Hurth T., Ja

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS Vol. 2020 ( 2 ) 2020.2

Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment

Abudinen F, Adachi I, Ahlburg P, Aihara H, Akopov N, Aloisio A, Ameli F, Andricek L, Ky N. Anh, Asner D. M, Atmacan H, Aushev T, Aushev V, Aziz T, Azmi K, Babu V, Baehr S, Bahinipati S, Bakich A. M, Bambade P, Banerjee Sw, Bansal S, Bansal V, Barrett M, Baudot J, Beaulieu A, Becker J, Behera P. K, Bennett J. V, Bernieri E, Bernlochner F. U, Bertemes M, Bessner M, Bettarini S, Bhardwaj V, Bianchi F, Bilka T, Bilokin S, Biswas D, Bonvicini G, Bozek A, Bracko M

CHINESE PHYSICS C Vol. 44 ( 2 ) 2020.2

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

From April to July 2018, a data sample at the peak energy of the γ(4S) resonance was collected with the Belle II detector at the SuperKEKB electron-positron collider. This is the first data sample of the Belle II experiment. Using Bhabha and digamma events, we measure the integrated luminosity of the data sample to be (496.3 ± 0.3 ± 3.0) pb-1, where the first uncertainty is statistical and the second is systematic. This work provides a basis for future luminosity measurements at Belle II.

DOI： 10.1088/1674-1137/44/2/021001

Web of Science

Scopus

Study of photodetector upgrade for ARICH in Belle II experiment 1

Furui K., Adachi I., Iijima T., Iwata S., Ogawa K., Ogawa R., Kakuno S., Kitamura H., Kindou H., Kuze K., Kumeta T., Kohriki T., Kobayashi M., Konno T., Shouji M., Sumiyoshi T., Tabata M., Tamechika M., Nishida S., Nishimura M., Yusa Y., Yonenaga K., Yun TsungLai

Meeting Abstracts of the Physical Society of Japan Vol. 75.1 ( 0 ) page： 102 - 102 2020

Observation of a vector charmoniumlike state in e(+)e(-) -> D-s(+) D-s1 (2536)(-) + c.c.

Jia S, Shen C. P, Yuan C. Z, Wang X. L, Adachi I, Aihara H, Asner D. M, Atmacan H, Aulchenko V, Ayad R, Babu V, Badhrees I, Bakich A. M, Behera P, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chang P, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S-K, Choi Y, Cinabro D, Cunliffe S, De Nardo G, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Epifanov D, Fast J. E, Ferber

PHYSICAL REVIEW D Vol. 100 ( 11 ) 2019.12

Measurements of the branching fractions B(B- -> (Lambda)over-bar(c)(-)Xi(c)'(0)), B(B- -> (Lambda)over-bar(c)(-)Xi(c)(2645)(0)) and B(B- -> (Lambda)over-bar(c)(-)Xi(c)(2790)(0))

Li Y, Li Y. B, Shen C. P, Adachi I, Aihara H, Asner D. M, Atmacan H, Aulchenko V, Ayad R, Babu V, Badhrees I, Bakich A. M, Behera P, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chang P, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S-K, Choi Y, Cinabro D, Cunliffe S, De Nardo G, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Fast J. E, Ferber T, Ferlewicz D, Fulsom B. G, Garg R

PHYSICAL REVIEW D Vol. 100 ( 11 ) 2019.12

Compact buncher cavity for muons accelerated by a radio-frequency quadrupole

Otani M, Sue Y, Futatsukawa K, Iijima T, Iinuma H, Kawamura N, Kitamura R, Kondo Y, Morishita T, Nakazawa Y, Yasuda H, Yotsuzuka M, Saito N, Yamazaki T

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 946 2019.12

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

A buncher cavity has been developed for the muons accelerated by a radio-frequency quadrupole linac (RFQ). The buncher cavity is designed for beta= v/c = 0.04 at an operational frequency of 324 MHz. It employs a double-gap structure operated in the TEM mode for the required effective voltage with compact dimensions, in order to account for the limited space of the experiment. The measured resonant frequency and unloaded quality factor are 323.95 MHz and 3.06 x 10(3), respectively. The buncher cavity was successfully operated for longitudinal bunch size measurement of the muons accelerated by the RFQ.

DOI： 10.1016/j.nima.2019.162693

Web of Science

The Belle II Physics Book

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS Vol. 2019 ( 12 ) 2019.12

Observation of a new structure near 10.75 GeV in the energy dependence of the e(+)e(-)-> Upsilon (nS)pi(+)pi(-) (n=1, 2, 3) cross sections

Mizuk R, Bondar A, Adachi I, Aihara H, Asner D. M, Aulchenko V, Aushev T, Ayad R, Badhrees I, Bahinipati S, Bakich A. M, Behera P, Beleno C, Berger M, Bhardwaj V, Bilka T, Biswal J, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S-K, Choi Y, Cinabro D, Cunliffe S, Dash N, De Nardo G, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Epifanov D, Fast J. E, Ferber T, Fulsom B. G

JOURNAL OF HIGH ENERGY PHYSICS Vol. 2019 ( 10 ) 2019.10

Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

We report a new measurement of the e+e−→ ϒ(nS)π+π− (n = 1, 2, 3) cross sections at energies from 10.52 to 11.02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. We observe a new structure in the energy dependence of the cross sections; if described by a Breit-Wigner function its mass and width are found to be $$ M=\left(10752.7\pm {5.9}_{-1.1}^{+0.7}\right)\mathrm{MeV}/{c}^2 $$ and $$ \Gamma =\left({35.5}_{-11.3\kern0.5em -3.3}^{+17.6+3.9}\right) $$MeV, where the first error is statistical and the second is systematic. The global significance of the new structure including systematic uncertainty is 5.2 standard deviations. We also find evidence for the e+e−→ ϒ (1S)π+π− process at the energy 10.52 GeV, which is below the B$$ \overline{B} $$ threshold.

DOI： 10.1007/JHEP10(2019)220

Web of Science

First measurement of the CKM angle phi(3) with B-+/--> D(K-S(0)pi(+)pi(-)pi(0)) K-+/- decays

Li Y, Li Y. B, Shen C. P, Adachi I, Aihara H, Asner D. M, Atmacan H, Aulchenko V, Ayad R, Babu V, Badhrees I, Bakich A. M, Behera P, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chang P, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S. -K, Choi Y, Cinabro D, Cunliffe S, De Nardo G, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Fast J. E, Ferber T, Ferlewicz D, Fulsom B. G

JOURNAL OF HIGH ENERGY PHYSICS Vol. 2019 ( 10 ) 2019.10

Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

We present the first model-independent measurement of the CKM unitarity triangle angle ϕ3 using B±→ D($$ {K}_{\mathrm{S } }^0 $$π+π−π0) K± decays, where D indicates either a D0 or $$ \overline{D} $$0 meson. Measurements of the strong-phase difference of the D →$$ {K}_{\mathrm{S } }^0 $$π+π−π0 amplitude obtained from CLEO-c data are used as input. This analysis is based on the full Belle data set of 772 × 106B$$ \overline{B} $$ events collected at the Υ(4S) resonance. We obtain ϕ3 = ($$ {5.7}_{-8.8}^{+10.2} $$±3.5±5.7)° and the suppressed amplitude ratio rB = 0.323±0.147±0.023±0.051. Here the first uncertainty is statistical, the second is the experimental systematic, and the third is due to the precision of the strong-phase parameters measured from CLEO-c data. The 95% confidence interval on ϕ3 is (−29.7, 109.5)°, which is consistent with the current world average.

DOI： 10.1007/JHEP10(2019)178

Web of Science

Observation of tau(-) -> pi(-)nu(tau)e(+)e(-) and search for tau(-) -> pi(-)nu(tau)mu(+)mu(-)

Jin Y, Aihara H, Epifanov D, Adachi I, Al Said S, Asner D. M, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bansal V, Behera P, Berger M, Bhardwaj V, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bracko M, Campajola M, Cao L, Cervenkov D, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Carlo S, Dolezal Z, Dong T. V, Dossett D, Eidelman S, Fast J. E, Ferber T, Fulsom B. G, Garg

PHYSICAL REVIEW D Vol. 100 ( 7 ) 2019.10

Measurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) at Belle

Waheed E, Urquijo P, Ferlewicz D, Adachi I, Adamczyk K, Aihara H, Al Said S, Asner D. M, Atmacan H, Aushev T, Ayad R, Babu V, Badhrees I, Bansal V, Behera P, Beleno C, Bernlochner F, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bracko M, Browder T. E, Campajola M, Cervenkov D, Chang P, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S. -K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Carlo S, Dolezal Z, Dong T. V, Dos

PHYSICAL REVIEW D Vol. 100 ( 5 ) 2019.9

Beam commissioning of muon beamline using negative hydrogen ions generated by ultraviolet light

Nakazawa Y, Bae S, Choi H, Choi S, Iijima T, Iinuma H, Kawamura N, Kitamura R, Kim B, Ko H. S, Kondo Y, Mibe T, Otani M, Razuvaev G. P, Saito N, Sue Y, Won E, Yamazaki T, Yasuda H

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Vol. 937 page： 164-167 - 167 2019.9

Search for Omega(2012) -> K Xi(1530) -> K pi Xi at Belle

Jia S, Shen C. P, Adachi I, Ahn J. K, Aihara H, Al Said S, Asner D. M, Aushev T, Ayad R, Babu V, Bahinipati S, Bakich A. M, Behera P, Beleno C, Bennett J, Berger M, Bhardwaj V, Bilka T, Biswal J, Bobrov A, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S-K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, De Nardo G, Di Capua F, Di Carlo S, Dolezal Z, Dong T. V, Eidelman

PHYSICAL REVIEW D Vol. 100 ( 3 ) 2019.8

First measurements of absolute branching fractions of the Xi(+)(c) baryon at Belle

Li Y. B, Shen C. P, Adachi I, Ahn J. K, Aihara H, Al Said S, Asner D. M, Atmacan H, Aushev T, Ayad R, Babu V, Bakich A. M, Ban Y, Bansal V, Behera P, Beleno C, Berger M, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Carlo S, Dolezal Z, Dossett D, Eidelman S, Epifanov D, Fast J. E

PHYSICAL REVIEW D Vol. 100 ( 3 ) 2019.8

Search for B-0 -> X(3872)gamma

Chou P-C, Chang P, Adachi I, Aihara H, Al Said S, Asner D. M, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich A. M, Behera P, Bennett J, Berger M, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S-K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Epifanov D, Fast J. E

PHYSICAL REVIEW D Vol. 100 ( 1 ) 2019.7

Measurement of branching fraction and final-state asymmetry for the (B)over-bar(0) -> (KSK -/+)-K-0 pi(+/-) decay

Lai Y-T, Adachi I, Aihara H, Al Said S, Asner D. M, Atmacan H, Aulchenko V, Aushev T, Babu V, Badhrees I, Bakich A. M, Bansal V, Behera P, Beleno C, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bozek A, Bracko M, Cao L, Cervenkov D, Chang P, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho K, Choi S-K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Epifanov D, Fast J. E, Frey A, Fulsom B. G, Garg R, Gaur V, Gabyshev N

PHYSICAL REVIEW D Vol. 100 ( 1 ) 2019.7

Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e(+)e(-) annihilation at root s=10.58 GeV

Seidl R, Adachi I, Ahn J. K, Aihara H, Asner D. M, Aulchenko V, Aushev T, Ayad R, Bakich A. M, Bansal V, Behera P, Beleno C, Berger M, Bhardwaj V, Bilka T, Biswal J, Bobrov A, Bozek A, Bracko M, Cao L, Cervenkov D, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Carlo S, Dolezal Z, Dong T. V, Drasal Z, Eidelman S, Epifanov D, Fast J. E, Ferber T, Fulsom B. G, Garg R, Gaur V, Gabyshev N, Garmash A, Gelb M., Giri

PHYSICAL REVIEW D Vol. 99 ( 11 ) 2019.6

Search for X(3872) and X(3915) decay into chi(c1)pi(0) in B decays at Belle

Bhardwaj V, Jia S, Adachi I, Aihara H, Asner D. M, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bansal V, Behera P, Beleno C, Berger M, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chang P, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho H. E, Cho K, Choi S-K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Carlo S, Dolezal Z, Dong T. V, Eidelman S, Epifanov D, Fast J. E

PHYSICAL REVIEW D Vol. 99 ( 11 ) 2019.6

Evidence for the decay B-0 -> p(p)over-bar pi(0)

Pal B, Adachi I, Adamczyk K, Aihara H, Asner D. M, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bansal V, Behera P, Beleno C, Berger M, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bozek A, Bracko M, Browder T. E, Campajola M, Cao L, Cervenkov D, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho K, Choi S. -K, Choi Y, Cinabro D, Cunliffe S, Di Carlo S, Dolezal Z, Dong T. V, Dossett D, Eidelman S, Epifanov D, Fast J. E, Ferber T., Fu

PHYSICAL REVIEW D Vol. 99 ( 9 ) 2019.5

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER PHYSICAL SOC

We report a search for the charmless baryonic decay B-0 -> p (p) over bar pi(0) with a data sample corresponding to an integrated luminosity of 711 fb(-1) containing (772 +/- 10) x 10(6) B (B) over bar pairs. The data were collected by the Belle experiment running on the Upsilon(4S) resonance at the KEKB e(+) e(-) collider. We measure a branching fraction B(B-0 -> p (p) over bar pi(0)) = (5.0 +/- 1.8 +/- 0.6) x 10(-7), where the first uncertainty is statistical and the second is systematic. The signal has a significance of 3.1 standard deviations and constitutes the first evidence for this decay mode. We also search for the intermediate two-body decays B-0 -> Delta(+)(p) over bar and B-0 ->(Delta) over bar (-) p, and set an upper limit on the branching fraction, B(B-0 -> Delta(+)(p) over bar ) + B(B-0 ->(Delta) over bar (-) p) < 1.6 x 10(-6) at 90% confidence level.

DOI： 10.1103/PhysRevD.99.091104

Web of Science

A new approach for measuring the muon anomalous magnetic moment and electric dipole moment

Abe M, Bae S, Beer G, Bunce G, Choi H, Choi S, Chung M, da Silva W, Eidelman S, Finger M, Fukao Y, Fukuyama T, Haciomeroglu S, Hasegawa K, Hayasaka K, Hayashizaki N, Hisamatsu H, Iijima T, Iinuma H, Ikeda H, Ikeno M, Inami K, Ishida K, Itahashi T, Iwasaki M, Iwashita Y, Iwata Y, Kadono R, Kamal S, Kamitani T, Kanda S, Kapusta F, Kawagoe K, Kawamura N, Kim B, Kim Y, Kishishita T, Kitamura R, Ko H, Kohriki T, Kondo Y, Kume T, Lee M. J, Lee S, Lee W., Mar

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS Vol. 2019 ( 5 ) 2019.5

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Papers - IIJIMA, Toru