Elsevier

Physics Letters B

Volume 728, 20 January 2014, Pages 85-94
Physics Letters B

Measurement of the charge asymmetry in B±ϕK± and search for B±ϕπ± decays

https://doi.org/10.1016/j.physletb.2013.11.036Get rights and content
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Abstract

The CP-violating charge asymmetry in B±ϕK± decays is measured in a sample of pp collisions at 7 TeV centre-of-mass energy, corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment. The result is ACP(B±ϕK±)=0.022±0.021±0.009, where the first uncertainty is statistical and the second systematic. In addition, a search for the B±ϕπ± decay mode is performed, using the B±ϕK± decay rate for normalization. An upper limit on the branching fraction B(B±ϕπ±)<1.5×107 is set at 90% confidence level.

Cited by (0)

t

Associated to Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.

u

Associated to Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.

v

Associated to European Organization for Nuclear Research (CERN), Geneva, Switzerland.

a

P.N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia.

b

Università di Bari, Bari, Italy.

c

Università di Bologna, Bologna, Italy.

d

Università di Cagliari, Cagliari, Italy.

e

Università di Ferrara, Ferrara, Italy.

f

Università di Firenze, Firenze, Italy.

g

Università di Urbino, Urbino, Italy.

h

Università di Modena e Reggio Emilia, Modena, Italy.

i

Università di Genova, Genova, Italy.

j

Università di Milano Bicocca, Milano, Italy.

k

Università di Roma Tor Vergata, Roma, Italy.

l

Università di Roma La Sapienza, Roma, Italy.

m

Università della Basilicata, Potenza, Italy.

n

LIFAELS, La Salle, Universitat Ramon Llull, Barcelona, Spain.

o

Hanoi University of Science, Hanoi, Viet Nam.

p

Institute of Physics and Technology, Moscow, Russia.

q

Università di Padova, Padova, Italy.

r

Università di Pisa, Pisa, Italy.

s

Scuola Normale Superiore, Pisa, Italy.