Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays

Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays

Bibliographic Details
Parent link:	Physical Review Letters Vol. 124, iss. 11.— 2020.— [111802, 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, Adeva B. Bernardo, Adinolfi M. Marco, Aidala C. Christine, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Summary:	Title screen Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity of 8.5 fb−1, collected with the LHCb detector in pp collisions at center of mass energies of 7, 8, and 13 TeV. The isospin amplitude ratio \|A1(Λ0b→J/ψΣ0)/A0(Λ0b→J/ψΛ)\|, where the subscript on A indicates the final-state isospin, is measured to be less than 1/21.8 at 95% confidence level. The Cabibbo suppressed Ξ0b→J/ψΛ decay is observed for the first time, allowing for the measurement \|A0(Ξ0b→J/ψΛ)/A1/2(Ξ0b→J/ψΞ0)\|=0.37±0.06±0.02, where the uncertainties are statistical and systematic, respectively.
Published:	2020
Subjects:	электронный ресурс труды учёных ТПУ
Online Access:	https://doi.org/10.1103/PhysRevLett.124.111802
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662344

Internet

https://doi.org/10.1103/PhysRevLett.124.111802