Observation of a new baryon state in the Λ0bπ+π− mass spectrum; Journal of High Energy Physics; Vol. 2020, iss. 6

Observation of a new baryon state in the Λ0bπ+π− mass spectrum; Journal of High Energy Physics; Vol. 2020, iss. 6

Dades bibliogràfiques
Parent link:Journal of High Energy Physics
Vol. 2020, iss. 6.— 2020.— [136, 25 p.]
Autor corporatiu: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники
Altres autors: 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
Sumari:Title screen
A new baryon state is observed in the Λ0bπ+π− mass spectrum with high significance using a data sample of pp collisions, collected with the LHCb detector at centre-of-mass energies √s = 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The mass and natural width of the new state are measured to bem=6072.3±2.9±0.6±0.2 MeV,Γ=72±11±2 MeV,m=6072.3±2.9±0.6±0.2 MeV,Γ=72±11±2 MeV,where the first uncertainty is statistical and the second systematic. The third uncertainty for the mass is due to imprecise knowledge of the Λ0bΛb0 baryon mass. The new state is consistent with the first radial excitation of the Λ0bΛb0 baryon, the Λb(2S)0 resonance. Updated measurements of the masses and the upper limits on the natural widths of the previously observed Λb(5912)0 and Λb(5920)0 states are also reported.
Idioma:anglès
Publicat: 2020
Matèries:
электронный ресурс
труды учёных ТПУ
B physics
heavy quark production
spectroscopy
Hadron-Hadron scattering (experiments)
Accés en línia:https://doi.org/10.1007/JHEP06(2020)136
Format: Electrònic Capítol de llibre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664633

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