Observation of New Resonances in the Λ0bπ+π− System

Observation of New Resonances in the Λ0bπ+π− System

Bibliographic Details
Parent link:	Physical Review Letters Vol. 123, iss. 15.— 2019.— [152001, 11 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, Beteta C. A. Carlos Abellan, Ackernley T., Eydelman S. I. Semen Isaakovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Summary:	Title screen Using pp collision data corresponding to an integrated luminosity of 8.5 fb−1 recorded by the LHCb experiment at center-of-mass energies of √s=7, 8, and 13 TeV, the observation of an excited B+c state in the B+cπ+π− invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(B+c) MeV/c2, where the last uncertainty is due to the limited knowledge of the B+c mass. It is consistent with expectations of the B∗c(23S1)+ state reconstructed without the low-energy photon from the B∗c(13S1)+→B+cγ decay following B∗c(23S1)+→B∗c(13S1)+π+π−. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(B+c) MeV/c2, and is consistent with the Bc(21S0)+ state. These mass measurements are the most precise to date.
Published:	2019
Subjects:	электронный ресурс труды учёных ТПУ
Online Access:	https://doi.org/10.1103/PhysRevLett.123.152001
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663418

Internet

https://doi.org/10.1103/PhysRevLett.123.152001