Elsevier

Physics Letters B

Volume 736, 7 September 2014, Pages 186-195
Physics Letters B

Measurement of the CP-violating phase ϕs in B¯s0J/ψπ+π decays

https://doi.org/10.1016/j.physletb.2014.06.079Get rights and content
Under a Creative Commons license
open access

Abstract

The mixing-induced CP-violating phase ϕs in Bs0 and B¯s0 decays is measured using the J/ψπ+π final state in data, taken from 3 fb−1 of integrated luminosity, collected with the LHCb detector in 7 and 8 TeV centre-of-mass pp collisions at the LHC. A time-dependent flavour-tagged amplitude analysis, allowing for direct CP violation, yields a value for the phase ϕs=70±68±8 mrad. This result is consistent with the Standard Model expectation and previous measurements.

Cited by (0)

v

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

w

Associated to Center for High Energy Physics, Tsinghua University, Beijing, China.

x

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

y

Associated to Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia.

z

Associated to Universitat de Barcelona, Barcelona, Spain

aa

Associated to Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.

ab

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

a

Universidade Federal do Triângulo Mineiro (UFTM), Uberaba MG, Brazil.

b

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

c

Università di Bari, Bari, Italy.

d

Università di Bologna, Bologna, Italy.

e

Università di Cagliari, Cagliari, Italy.

f

Università di Ferrara, Ferrara, Italy.

g

Università di Firenze, Firenze, Italy.

h

Università di Urbino, Urbino, Italy.

i

Università di Modena e Reggio Emilia, Modena, Italy.

j

Università di Genova, Genova, Italy.

k

Università di Milano Bicocca, Milano, Italy.

l

Università di Roma Tor Vergata, Roma, Italy.

m

Università di Roma La Sapienza, Roma, Italy.

n

Università della Basilicata, Potenza, Italy.

o

AGH – University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland.

p

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

q

Hanoi University of Science, Hanoi, Viet Nam.

r

Università di Padova, Padova, Italy.

s

Università di Pisa, Pisa, Italy.

t

Scuola Normale Superiore, Pisa, Italy.

u

Università degli Studi di Milano, Milano, Italy.