Observation of a New Ξ−b Resonance

Observation of a New Ξ−b Resonance

Bibliographic Details
Parent link:Physical Review Letters: Scientific Journal.— , 1958-
Vol. 121, iss. 7.— 2018.— [072002 , 12 p.]
Corporate Authors: 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
Other Authors: Aaij R. Roel, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich, Vagner A. R. Aleksandr Rudolfovich
Summary:Title screen
From samples of pp collision data collected by the LHCb experiment at √s=7, 8 and 13 TeV, corresponding to integrated luminosities of 1.0, 2.0 and 1.5  fb−1, respectively, a peak in both the Λ0bK− and Ξ0bπ− invariant mass spectra is observed. In the quark model, radially and orbitally excited Ξ−b resonances with quark content bds are expected. Referring to this peak as Ξb(6227)−, the mass and natural width are measured to be mΞb(6227)−=6226.9±2.0±0.3±0.2  MeV/c2 and ΓΞb(6227)−=18.1±5.4±1.8  MeV/c2, where the first uncertainty is statistical, the second is systematic, and the third, on mΞb(6227)−, is due to the knowledge of the Λ0b baryon mass. Relative production rates of the Ξb(6227)−→Λ0bK− and Ξb(6227)−→Ξ0bπ− decays are also reported.
Published: 2018
Subjects:
электронный ресурс
труды учёных ТПУ
Online Access:http://earchive.tpu.ru/handle/11683/57796
https://doi.org/10.1103/PhysRevLett.121.072002
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658780

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