Observation of a new baryon state in the Λ0bπ+π− mass spectrum

Observation of a new baryon state in the Λ0bπ+π− mass spectrum

Bibliographic Details
Parent link:	Journal of High Energy Physics Vol. 2020, iss. 6.— 2020.— [136, 25 p.]
Corporate Authors:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники (ОАР)
Other Authors:	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
Summary:	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.
Published:	2020
Subjects:	электронный ресурс труды учёных ТПУ B physics heavy quark production spectroscopy Hadron-Hadron scattering (experiments)
Online Access:	https://doi.org/10.1007/JHEP06(2020)136
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664633

Internet

https://doi.org/10.1007/JHEP06(2020)136