Observation of New Resonances Decaying to J/ψK+ and J/ψϕ

Observation of New Resonances Decaying to J/ψK+ and J/ψϕ

Detaylı Bibliyografya
Parent link:Physical Review Letters
Vol. 127, iss. 8.— 2021.— [082001, 11 p.]
Kurumsal yazarlar: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники (ОАР), Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Diğer Yazarlar: Aaij R. Roel, Beteta C. A. Carlos Abellan, Eydelman S. I. Semen Isaakovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich
Özet:Title screen
The first observation of exotic states with a new quark content c¯cu¯s decaying to the J/ψK+ final state is reported with high significance from an amplitude analysis of the B+→J/ψϕK+ decay. The analysis is carried out using proton-proton collision data corresponding to a total integrated luminosity of 9  fb−1 collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The most significant state, Zcs(4000)+, has a mass of 4003±6+4−14  MeV, a width of 131±15±26  MeV, and spin parity JP=1+, where the quoted uncertainties are statistical and systematic, respectively. A new 1+  X(4685) state decaying to the J/ψϕ final state is also observed with high significance. In addition, the four previously reported J/ψϕ states are confirmed and two more exotic states, Zcs(4220)+ and X(4630), are observed with significance exceeding 5 standard deviations.
Baskı/Yayın Bilgisi: 2021
Konular:
электронный ресурс
труды учёных ТПУ
Online Erişim:http://earchive.tpu.ru/handle/11683/72773
https://doi.org/10.1103/PhysRevLett.127.082001
Materyal Türü: Elektronik Kitap Bölümü
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666690
Diğer Bilgiler
Özet:Title screen
The first observation of exotic states with a new quark content c¯cu¯s decaying to the J/ψK+ final state is reported with high significance from an amplitude analysis of the B+→J/ψϕK+ decay. The analysis is carried out using proton-proton collision data corresponding to a total integrated luminosity of 9  fb−1 collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The most significant state, Zcs(4000)+, has a mass of 4003±6+4−14  MeV, a width of 131±15±26  MeV, and spin parity JP=1+, where the quoted uncertainties are statistical and systematic, respectively. A new 1+  X(4685) state decaying to the J/ψϕ final state is also observed with high significance. In addition, the four previously reported J/ψϕ states are confirmed and two more exotic states, Zcs(4220)+ and X(4630), are observed with significance exceeding 5 standard deviations.
DOI:10.1103/PhysRevLett.127.082001

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