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

Дата
2021
Авторы
Teramoto, Y.
Uehara, S.
Masuda, M.
Adachi, I.
Pakhlov, P.
Journal Title
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Volume Title
Издатель
Научные группы
Логотип проекта
Научная группа
Belle Collaboration
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Аннотация
© 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.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.
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Цитирование
Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions / Teramoto, Y. [et al.] // Physical Review Letters. - 2021. - 126. - № 12. - 10.1103/PhysRevLett.126.122001
URI
https://www.doi.org/10.1103/PhysRevLett.126.122001
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85103505018&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000652825900003
 https://openrepository.mephi.ru/handle/123456789/23850
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