# Measurement of angular parameters from the decay B0 → K⁎0μ+μ− in proton–proton collisions at s=8TeV

The CMS collaboration

96 引文 斯高帕斯（Scopus）

## 摘要

Angular distributions of the decay B0→K⁎0μ+μ are studied using a sample of proton–proton collisions at s=8TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 20.5fb−1. An angular analysis is performed to determine the P1 and P5 parameters, where the P5 parameter is of particular interest because of recent measurements that indicate a potential discrepancy with the standard model predictions. Based on a sample of 1397 signal events, the P1 and P5 parameters are determined as a function of the dimuon invariant mass squared. The measurements are in agreement with predictions based on the standard model.

原文 ???core.languages.en_GB??? 517-541 25 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 781 https://doi.org/10.1016/j.physletb.2018.04.030 已出版 - 10 6月 2018