Measurement of the CP-violating phase s in the decay Bs0→J/ψ
- Aaij, R
- Abellan Beteta, C
- Abellan Beteta, C
- Adeva, B
- Adinolfi, M
- Adrover, C
- Affolder, A
- Ajaltouni, Z
- Albrecht, J
- Alessio, F
- Alexander, M
- Alkhazov, G
- Alvarez Cartelle, P
- Alves, AA
- Amato, S
- Amhis, Y
- Anderson, J
- Appleby, RB
- Aquines Gutierrez, O
- Archilli, F
- Archilli, F
- Arrabito, L
- Artamonov, A
- Artuso, M
- Artuso, M
- Aslanides, E
- Auriemma, G
- Auriemma, G
- Bachmann, S
- Back, JJ
- Bailey, DS
- Balagura, V
- Balagura, V
- Baldini, W
- Barlow, RJ
- Barschel, C
- Barsuk, S
- Barter, W
- Bates, A
- Bauer, C
- Bauer, T
- Bay, A
- Bediaga, I
- Belogurov, S
- Belous, K
- Belyaev, I
- Belyaev, I
- Ben-Haim, E
- Benayoun, M
- Bencivenni, G
- Benson, S
- Benton, J
- Bernet, R
- Bettler, MO
- Van Beuzekom, M
- Bien, A
- Bifani, S
- Bird, T
- Bizzeti, A
- Bizzeti, A
- Bjørnstad, PM
- Blake, T
- Blanc, F
- Blanks, C
- Blouw, J
- Blusk, S
- Bobrov, A
- Bocci, V
- Bondar, A
- Bondar, N
- Bonivento, W
- Borghi, S
- Borghi, S
- Borgia, A
- Bowcock, TJV
- Bozzi, C
- Brambach, T
- Van Den Brand, J
- Bressieux, J
- Brett, D
- Britsch, M
- Britton, T
- Brook, NH
- Brown, H
- Büchler-Germann, A
- Burducea, I
- Bursche, A
- Buytaert, J
- Cadeddu, S
- Callot, O
- Calvi, M
- Calvi, M
- Calvo Gomez, M
- Calvo Gomez, M
- Camboni, A
- Campana, P
- Campana, P
- Carbone, A
- Carboni, G
- Carboni, G
DOIAbstract
We present a measurement of the time-dependent CP-violating asymmetry in Bs0→J/ψ decays, using data collected with the LHCb detector at the LHC. The decay time distribution of Bs0→J/ψ is characterized by the decay widths Γ H and Γ L of the heavy and light mass eigenstates, respectively, of the Bs0-B̄s0 system and by a CP-violating phase s. In a sample of about 8500 Bs0→J/ψevents isolated from 0.37fb -1 of pp collisions at √s=7TeV, we measure s=0.15±0.18(stat)±0.06(syst)rad. We also find an average Bs0 decay width Γ s (Γ L+Γ H)/2=0.657±0.009(stat)±0.008(syst)ps -1 and a decay width difference ΔΓ s Γ L- Γ H=0.123±0.029(stat)±0.011(syst)ps -1. Our measurement is insensitive to the transformation ( s, ΔΓ s) (π- s,-ΔΓ s). © 2012 CERN. Published ...
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