par Khachatryan, Vardan;Barria, Patrizia ;Caillol, Cécile ;Clerbaux, Barbara ;De Lentdecker, Gilles ;Delannoy, Hugo ;Fasanella, Giuseppe ;Favart, Laurent ;Gay, Arnaud ;Grebenyuk, Anastasia ;Karapostoli, Georgia ;Lenzi, Thomas ;Leonard, Alexandre ;Maerschalk, Thierry ;Marinov, Audrey ;Pernie, Luca ;Randle-Conde, Aidan Sean ;Reis, Thomas ;Seva, Tomislav ;Vander Velde, Catherine ;Vanlaer, Pascal ;Yonamine, Ryo ;Zenoni, Florian ;Zhang, Fengwangdong ; [et al.]
Référence Physics letters. Section B, 753, page (424-448)
Publication Publié, 2016-02
Référence Physics letters. Section B, 753, page (424-448)
Publication Publié, 2016-02
Article révisé par les pairs
Résumé : | The angular distributions and the differential branching fraction of the decay B0→K⁎(892)0μ+μ− are studied using data corresponding to an integrated luminosity of 20.5 fb−1 collected with the CMS detector at the LHC in pp collisions at s=8 TeV. From 1430 signal decays, the forward–backward asymmetry of the muons, the K⁎(892)0 longitudinal polarization fraction, and the differential branching fraction are determined as a function of the dimuon invariant mass squared. The measurements are among the most precise to date and are in good agreement with standard model predictions. |