Search for the Rare Decays B --> pi l+l- and B0 --> eta l+l-
J. P. Lees
(1)
,
V. Poireau
(1)
,
V. Tisserand
(1)
,
N. Arnaud
(2)
,
M. Davier
(2)
,
D. Derkach
(2)
,
G. Grosdidier
(2)
,
F. Le Diberder
(2)
,
A.M. Lutz
(2)
,
B. Malaescu
(2)
,
P. Roudeau
(2)
,
M.H. Schune
(2)
,
A. Stocchi
(2)
,
G. Wormser
(2)
,
D. Bernard
(3)
,
M. Verderi
(3)
,
S. Emery
(4)
,
G. Hamel de Monchenault
(4)
,
G. Vasseur
(4)
,
Ch. Yèche
(4)
,
S. Akar
(5)
,
E. Ben-Haim
(5)
,
M. Bomben
(5)
,
G.R. Bonneaud
(5)
,
H. Briand
(5)
,
G. Calderini
(5)
,
J. Chauvau
(5)
,
O. Hamon
(5)
,
Ph. Leruste
(5)
,
G. Marchiori
(5)
,
J. Ocariz
(5)
,
S. Sitt
(5)
N. Arnaud
- Function : Author
- PersonId : 16841
- IdHAL : nicolas-arnaud
- ORCID : 0000-0001-6589-8673
G. Vasseur
- Function : Author
- PersonId : 745439
- IdHAL : georges-vasseur
M. Bomben
- Function : Author
- PersonId : 1380362
- ORCID : 0000-0002-9807-861X
- IdRef : 242005462
G. Calderini
- Function : Author
- PersonId : 10608
- IdHAL : giovanni-calderini
- ORCID : 0000-0002-9495-9145
- IdRef : 172243211
G. Marchiori
- Function : Author
- PersonId : 741274
- IdHAL : giovanni-marchiori
- ORCID : 0000-0003-2655-7643
- IdRef : 180997203
Abstract
We present the results of a search for the rare flavor-changing neutral-current decays B --> pi l+l- (pi=pi+/-, pi0 and l = e,mu) and B0 --> eta l+l- using a sample of e+e- --> Y(4S) BB decays decays corresponding to 428 fb^-1 of integrated luminosity collected by the BABAR detector. No significant signal is observed, and we set an upper limit on the isospin and lepton-flavor averaged branching fraction of BF(B --> pi l+l-) < 7.0 x 10^-8 and a lepton-flavor averaged upper limit of BF(B0 --> eta l+l-) < 9.2 x 10^-8, both at the 90% confidence level. We also report 90% confidence level branching fraction upper limits for the individual modes B+ --> pi+ e+e-, B0 --> pi0 e+e-, B+ --> pi+ mu+mu-, B0 --> pi0 mu+mu-, B0 --> eta e+e-, and B0 --> eta mu+mu-.