The differential branching fraction with respect to the dimuon invariant mass squared, and the CP asymmetry of the B± → π±μ+μ− decay are measured for the first time. The CKM matrix elements |Vtd| and |Vts|, and the ratio |Vtd/Vts| are determined. The analysis is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The total branching fraction and CP asymmetry of B± → π±μ+μ− decays are measured to be (Formula presented.) where the first uncertainties are statistical and the second are systematic. These are the most precise measurements of these observables to date, and they are compatible with the predictions of the Standard Model.

First measurement of the differential branching fraction and CP asymmetry of the B± → π±μ+ μ− decay

Cenci R.
Membro del Collaboration Group
;
Lusiani A.;Marino P.
Membro del Collaboration Group
;
Morello M. J.
Membro del Collaboration Group
;
Stracka S.
Membro del Collaboration Group
;
2015

Abstract

The differential branching fraction with respect to the dimuon invariant mass squared, and the CP asymmetry of the B± → π±μ+μ− decay are measured for the first time. The CKM matrix elements |Vtd| and |Vts|, and the ratio |Vtd/Vts| are determined. The analysis is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The total branching fraction and CP asymmetry of B± → π±μ+μ− decays are measured to be (Formula presented.) where the first uncertainties are statistical and the second are systematic. These are the most precise measurements of these observables to date, and they are compatible with the predictions of the Standard Model.
2015
Settore FIS/01 - Fisica Sperimentale
B physics; Branching fraction; CP violation; Hadron-Hadron Scattering; Rare decay
File in questo prodotto:
File Dimensione Formato  
JHEP10(2015)034.pdf

accesso aperto

Tipologia: Published version
Licenza: Creative Commons
Dimensione 524.14 kB
Formato Adobe PDF
524.14 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/141125
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 50
  • ???jsp.display-item.citation.isi??? 45
social impact