The isospin asymmetries of B → Kμ + μ - ; B → K * μ + μ - decays ; the partial branching fractions of the B 0 → K 0 μ + μ -, B + → K + μ + μ - ; B + → K *+ μ + μ - decays are measured as functions of the dimuon mass squared, q 2. The data used correspond to an integrated luminosity of 3 fb-1 from proton-proton collisions collected with the LHCb detector at centre-of-mass energies of 7 TeV ; 8 TeV in 2011 ; 2012, respectively. The isospin asymmetries are both consistent with the Standard Model expectations. The three measured branching fractions favour lower values than their respective theoretical predictions, however they are all individually consistent with the Standard Model. [Figure not available: see fulltext.] © 2014 The Author(s).
Differential branching fractions ; isospin asymmetries of B → K (*) μ + μ - decays
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2014-01-01
Abstract
The isospin asymmetries of B → Kμ + μ - ; B → K * μ + μ - decays ; the partial branching fractions of the B 0 → K 0 μ + μ -, B + → K + μ + μ - ; B + → K *+ μ + μ - decays are measured as functions of the dimuon mass squared, q 2. The data used correspond to an integrated luminosity of 3 fb-1 from proton-proton collisions collected with the LHCb detector at centre-of-mass energies of 7 TeV ; 8 TeV in 2011 ; 2012, respectively. The isospin asymmetries are both consistent with the Standard Model expectations. The three measured branching fractions favour lower values than their respective theoretical predictions, however they are all individually consistent with the Standard Model. [Figure not available: see fulltext.] © 2014 The Author(s).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.