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Phys Rev Lett. 2013 Jan 18;110(3):031801. doi: 10.1103/PhysRevLett.110.031801. Epub 2013 Jan 17.

Measurement of the CP asymmetry in B(0)→K(*0)μ(+)μ(-) decays.

Physical review letters

R Aaij, C Abellan Beteta, A Adametz, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, A A Alves, S Amato, Y Amhis, L Anderlini, J Anderson, R B Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, S Bachmann, J J Back, C Baesso, V Balagura, W Baldini, R J Barlow, C Barschel, S Barsuk, W Barter, A Bates, Th Bauer, A Bay, J Beddow, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, M Benayoun, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, M-O Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, P M Bjørnstad, T Blake, F Blanc, C Blanks, J Blouw, S Blusk, A Bobrov, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, T J V Bowcock, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, M Britsch, T Britton, N H Brook, H Brown, A Büchler-Germann, I Burducea, A Bursche, J Buytaert, S Cadeddu, O Callot, M Calvi, M Calvo Gomez, A 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Webber, D Websdale, M Whitehead, J Wicht, D Wiedner, L Wiggers, G Wilkinson, M P Williams, M Williams, F F Wilson, J Wishahi, M Witek, W Witzeling, S A Wotton, S Wright, S Wu, K Wyllie, Y Xie, F Xing, Z Xing, Z Yang, R Young, X Yuan, O Yushchenko, M Zangoli, M Zavertyaev, F Zhang, L Zhang, W C Zhang, Y Zhang, A Zhelezov, L Zhong, A Zvyagin,

Affiliations

  1. Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.

PMID: 23373912 DOI: 10.1103/PhysRevLett.110.031801

Abstract

A measurement of the CP asymmetry in B(0)→K(*0)μ(+)μ(-) decays is presented, based on 1.0 fb(-1) of pp collision data recorded by the LHCb experiment during 2011. The measurement is performed in six bins of invariant mass squared of the μ(+)μ(-) pair, excluding the J/ψ and ψ(2S) resonance regions. Production and detection asymmetries are removed using the B(0)→J/ψK(*0) decay as a control mode. The integrated CP asymmetry is found to be -0.072±0.040(stat)±0.005(syst), consistent with the standard model.

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