Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions

(Belle Collaboration)

doi:10.1103/PhysRevLett.126.122001

Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions

(Belle Collaboration)

Osaka Metropolitan University
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
The University of Osaka
The University of Tokyo
King Abdulaziz University
University of Tabuk
Brookhaven National Laboratory
University of Cincinnati
Higher School of Economics
German Electron Synchrotron
Indian Institute of Technology Madras
University of Göttingen
University of Mississippi
Indian Institute of Science Education and Research Mohali
Indian Institute of Technology Guwahati
Charles University
Jožef Stefan Institute
Wayne State University
H. Niewodniczanski Institute of Nuclear Physics
University of Maribor
University of Hawai'i at Mānoa
National Institute for Nuclear Physics
University of Naples Federico II
Fu Jen Catholic University
National Taiwan University
Max Planck Institute for Physics (Werner Heisenberg Institute)
National Central University
Hanyang University
RAS - P.N. Lebedev Physics Institute
Korea Institute of Science and Technology Information
Yonsei University
Gyeongsang National University
Sungkyunkwan University
Indian Institute of Technology Hyderabad
Fudan University
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Pacific Northwest National Laboratory
Panjab University
Virginia Polytechnic Institute and State University

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e+e-→e+e-J/ψ π+ π-, using 825 fb-1 of data collected by the Belle detector operated at the KEKB e+e-collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for γB(X(3872)→J/ψ π+ π-) assuming the Q2 dependence predicted by a cc meson model, where-Q2 is the invariant mass squared of the virtual photon. No X(3915)→J/ψ π+ π-candidates are found.

Original language	English
Article number	122001
Journal	Physical Review Letters
Volume	126
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.126.122001
State	Published - 23 Mar 2021

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10.1103/PhysRevLett.126.122001

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@article{c3488bb53e96460ba74596b27e64edbb,

title = "Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions",

abstract = "We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e+e-→e+e-J/ψ π+ π-, using 825 fb-1 of data collected by the Belle detector operated at the KEKB e+e-collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for γB(X(3872)→J/ψ π+ π-) assuming the Q2 dependence predicted by a cc meson model, where-Q2 is the invariant mass squared of the virtual photon. No X(3915)→J/ψ π+ π-candidates are found.",

author = "\{(Belle Collaboration)\} and Y. Teramoto and S. Uehara and M. Masuda and I. Adachi and H. Aihara and \{Al Said\}, S. and Asner, \{D. M.\} and H. Atmacan and T. Aushev and R. Ayad and V. Babu and P. Behera and C. Belen{\~o} and J. Bennett and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and M. Campajola and D. {\v C}ervenkov and Chang, \{M. C.\} and P. Chang and V. Chekelian and A. Chen and Cheon, \{B. G.\} and K. Chilikin and K. Cho and Cho, \{S. J.\} and Choi, \{S. K.\} and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and \{De Nardo\}, G. and \{Di Capua\}, F. and Z. Dole{\v Z}al and Dong, \{T. V.\} and S. Eidelman and T. Ferber and Fulsom, \{B. G.\} and R. Garg and V. Gaur and N. Gabyshev and A. Garmash and Kookhyun Kang and H. Park",

note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2021",

month = mar,

day = "23",

doi = "10.1103/PhysRevLett.126.122001",

language = "English",

volume = "126",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "12",

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TY - JOUR

T1 - Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions

AU - (Belle Collaboration)

AU - Teramoto, Y.

AU - Uehara, S.

AU - Masuda, M.

AU - Adachi, I.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Behera, P.

AU - Belenõ, C.

AU - Bennett, J.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Biswal, J.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Campajola, M.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, K.

AU - Cho, S. J.

AU - Choi, S. K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - De Nardo, G.

AU - Di Capua, F.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Eidelman, S.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Garg, R.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Kang, Kookhyun

AU - Park, H.

N1 - Publisher Copyright: © 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2021/3/23

Y1 - 2021/3/23

N2 - We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e+e-→e+e-J/ψ π+ π-, using 825 fb-1 of data collected by the Belle detector operated at the KEKB e+e-collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for γB(X(3872)→J/ψ π+ π-) assuming the Q2 dependence predicted by a cc meson model, where-Q2 is the invariant mass squared of the virtual photon. No X(3915)→J/ψ π+ π-candidates are found.

AB - We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e+e-→e+e-J/ψ π+ π-, using 825 fb-1 of data collected by the Belle detector operated at the KEKB e+e-collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for γB(X(3872)→J/ψ π+ π-) assuming the Q2 dependence predicted by a cc meson model, where-Q2 is the invariant mass squared of the virtual photon. No X(3915)→J/ψ π+ π-candidates are found.

UR - https://www.scopus.com/pages/publications/85103505018

U2 - 10.1103/PhysRevLett.126.122001

DO - 10.1103/PhysRevLett.126.122001

M3 - Article

C2 - 33834793

AN - SCOPUS:85103505018

SN - 0031-9007

VL - 126

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

M1 - 122001

ER -

Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions

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