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This content will become publicly available on October 10, 2025

Title: Sign structure of the t−t′−J model and its physical consequences
PAR ID:
10550968
Author(s) / Creator(s):
; ; ; ;
Publisher / Repository:
American Physical Society
Date Published:
Journal Name:
Physical Review B
Volume:
110
Issue:
16
ISSN:
2469-9950; PRBMDO
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Abstract

    A test of lepton flavor universality inB±K±μ+μandB±K±e+edecays, as well as a measurement of differential and integrated branching fractions of a nonresonantB±K±μ+μdecay are presented. The analysis is made possible by a dedicated data set of proton-proton collisions ats=13TeVrecorded in 2018, by the CMS experiment at the LHC, using a special high-rate data stream designed for collecting about 10 billion unbiased b hadron decays. The ratio of the branching fractionsB(B±K±μ+μ)toB(B±K±e+e)is determined from the measured double ratioR(K)of these decays to the respective branching fractions of theB±J/ψK±withJ/ψμ+μande+edecays, which allow for significant cancellation of systematic uncertainties. The ratioR(K)is measured in the range1.1<q2<6.0GeV2, whereqis the invariant mass of the lepton pair, and is found to beR(K)=0.780.23+0.47, in agreement with the standard model expectationR(K)1. This measurement is limited by the statistical precision of the electron channel. The integrated branching fraction in the sameq2range,B(B±K±μ+μ)=(12.42±0.68)×108, is consistent with the present world-average value and has a comparable precision.

     
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  2. null (Ed.)