Publication:
Deciphering the mechanism of near-threshold J/ ψ photoproduction

Дата
2020
Авторы
Du, M. L.
Baru, V.
Guo, F. K.
Hanhart, C.
Nefediev, A.
Journal Title
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Научные группы
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.
Выпуск журнала
Аннотация
© 2020, The Author(s).The photoproduction of the J/ ψ off the proton is believed to deepen our understanding of various physics issues. On the one hand, it is proposed to provide access to the origin of the proton mass, based on the QCD multipole expansion. On the other hand, it can be employed in a study of pentaquark states. The process is usually assumed to proceed through vector-meson dominance, that is the photon couples to a J/ ψ which rescatters with the proton to give the J/ ψp final state. In this paper, we provide a compelling hint for and propose measurements necessary to confirm a novel production mechanism via the ΛcD¯ (∗) intermediate states. In particular, there must be cusp structures at the ΛcD¯ (∗) thresholds in the energy dependence of the J/ ψ photoproduction cross section. The same mechanism also implies the J/ ψ-nucleon scattering lengths of order 1 mfm. Given this, one expects only a minor contribution of charm quarks to the nucleon mass.
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Цитирование
Deciphering the mechanism of near-threshold J/ ψ photoproduction / Du, M.-L. [et al.] // European Physical Journal C. - 2020. - 80. - № 11. - 10.1140/epjc/s10052-020-08620-5
URI
https://www.doi.org/10.1140/epjc/s10052-020-08620-5
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85096008440&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000594659200002
 https://openrepository.mephi.ru/handle/123456789/22581
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