Evidence for the Rare Decay Σ+→pμ+μ−

Evidence for the Rare Decay Σ+→pμ+μ−

Bibliographic Details
Parent link:	Physical Review Letters Vol. 120, iss. 22.— 2018.— [221803, 10 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, Adeva B. Bernardo, Adinolfi M. Marco, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich, Vagner A. R. Aleksandr Rudolfovich
Summary:	Title screen A search for the rare decay Σ+→pμ+μ− is performed using pp collision data recorded by the LHCb experiment at center-of-mass energies √s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. An excess of events is observed with respect to the background expectation, with a signal significance of 4.1 standard deviations. No significant structure is observed in the dimuon invariant mass distribution, in contrast with a previous result from the HyperCP experiment. The measured Σ+→pμ+μ− branching fraction is (2.2+1.8−1.3)×10−8, where statistical and systematic uncertainties are included, which is consistent with the standard model prediction.
Published:	2018
Subjects:	электронный ресурс труды учёных ТПУ
Online Access:	https://doi.org/10.1103/PhysRevLett.120.221803
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664770

Internet

https://doi.org/10.1103/PhysRevLett.120.221803