Measurement of the ratio of branching fractions B(B+c→J/ψK+)/B(B+c→J/ψπ+)
R. Aaij
,
L. Beaucourt
(1)
,
M. Chefdeville
(1)
,
D. Decamp
(1)
,
N. Déléage
(1)
,
P. Ghez
(1)
,
J.-P. Lees
(1)
,
J.-F. Marchand
(1)
,
M.-N. Minard
(1)
,
B. Pietrzyk
(1)
,
S. t'Jampens
(1)
,
V. Tisserand
(1)
,
E. Tournefier
(1)
,
S. Akar
(2)
,
J. Arnau Romeu
(2)
,
E. Aslanides
(2)
,
J. Cogan
(2)
,
K. De Bruyn
(2)
,
W. Kanso
(2)
,
R. Legac
(2)
,
O. Leroy
(2)
,
G. Mancinelli
(2)
,
M. Martin
(2)
,
A. Mordà
(2)
,
J. Serrano
(2)
,
A. Tayduganov
(2)
,
A. Tsaregorodtsev
(2)
,
Z.J. Ajaltouni
(3)
,
M. Baalouch
(3)
,
E. Cogneras
(3)
,
O. Deschamps
(3)
,
G. Gazzoni
(3)
,
M. Grabalosa Gándara
(3)
,
C. Hadjivasiliou
(3)
,
P. Henrard
(3)
,
M. Kozeiha
(3)
,
R. Lefèvre
(3)
,
J. Maratas
(3)
,
S. Monteil
(3)
,
P. Perret
(3)
,
M. Vernet
(3)
R. Aaij
- Function : Author
M. Chefdeville
- Function : Author
- PersonId : 741874
- IdHAL : maximilien-chefdeville
- ORCID : 0000-0002-6553-6493
S. t'Jampens
- Function : Author
- PersonId : 736045
- IdHAL : stephane-tjampens
- ORCID : 0000-0003-4249-6641
J. Cogan
- Function : Author
- PersonId : 750510
- IdHAL : julien-cogan
- ORCID : 0000-0001-7194-7566
- IdRef : 078779014
O. Leroy
- Function : Author
- PersonId : 171866
- IdHAL : olivier-leroy
- ORCID : 0000-0002-2589-240X
- IdRef : 169871835
J. Serrano
- Function : Author
- PersonId : 175327
- IdHAL : justine-serrano
- ORCID : 0000-0003-2489-7812
- IdRef : 127525521
E. Cogneras
- Function : Author
- PersonId : 743220
- IdHAL : eric-cogneras
- ORCID : 0000-0002-8933-9427
P. Perret
- Function : Author
- PersonId : 739797
- IdHAL : pascal-perret
- ORCID : 0000-0002-5732-4343
M. Vernet
- Function : Author
- PersonId : 776331
- ORCID : 0000-0003-3128-0650
Abstract
The ratio of branching fractions RK/π≡B(B+c→J/ψK+)/B(B+c→J/ψπ+) is measured with pp collision data collected by the LHCb experiment at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3fb−1. It is found to be RK/π=0.079±0.007±0.003, where the first uncertainty is statistical and the second is systematic. This measurement is consistent with the previous LHCb result, while the uncertainties are significantly reduced.