Observation of Multiplicity Dependent Prompt χc1(3872) and ψ(2S) Production in pp Collisions; Physical Review Letters; Vol. 126, iss. 9

Observation of Multiplicity Dependent Prompt χc1(3872) and ψ(2S) Production in pp Collisions; Physical Review Letters; Vol. 126, iss. 9

Bibliografiska uppgifter
Parent link:Physical Review Letters
Vol. 126, iss. 9.— 2020.— [092001, 11 p.]
Institutionella upphovsmän: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники, Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Övriga upphovsmän: Aaij R. Roel, Beteta C. A. Carlos Abellan, Ackernley T., Adeva B. Bernardo, Eydelman S. I. Semen Isaakovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich
Sammanfattning:Title screen
The production of χc1(3872) and ψ(2S) hadrons is studied as a function of charged particle multiplicity in pp collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2  fb−1. For both states, the fraction that is produced promptly at the collision vertex is found to decrease as charged particle multiplicity increases. The ratio of χc1(3872) to ψ(2S) cross sections for promptly produced particles is also found to decrease with multiplicity, while no significant dependence on multiplicity is observed for the equivalent ratio of particles produced away from the collision vertex in b-hadron decays. This behavior is consistent with a calculation that models the χc1(3872) structure as a compact tetraquark. Comparisons with model calculations and implications for the binding energy of the χc1(3872) state are discussed.
Språk:engelska
Publicerad: 2020
Ämnen:
электронный ресурс
труды учёных ТПУ
Länkar:ttps://doi.org/10.1103/PhysRevLett.126.092001
Materialtyp: Elektronisk Bokavsnitt
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664674

Liknande verk

Liknande verk