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Evidence for the decay X(3872)→ψ(2S)γ

Nuclear Physics B 886 (2014) 665-680

Authors:

R Aaij, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, L Anderlini, J Anderson, R Andreassen, M Andreotti, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, V Balagura, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, T Bauer, A Bay, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, MO Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, N Bondar, W Bonivento, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, M Britsch, T Britton, NH Brook, H Brown, A Bursche, G Busetto, G Busetto, J Buytaert, S Cadeddu, R Calabrese, R Calabrese, O Callot, M Calvi, M Calvi, M Calvo Gomez

Abstract:

Evidence for the decay mode X(3872)→ψ(2S)γ in B +→X(3872)K + decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton-proton collisions, corresponding to an integrated luminosity of 3 fb-1, collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872)→ψ(2S)γ decay to that of the X(3872)→J/ψγ decay is measured to beB(X(3872)→ψ(2S)γ)B(X(3872)→J/ψγ)=2.46±0.64±0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure DD-* molecular interpretation of the X(3872) state. © 2014 CERN for the benefit of the LHCb Collaboration.
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Measurement of CP asymmetries in the decays B0 → K*0μ+μ− and B+ → K+μ+μ−

Journal of High Energy Physics 2014:9 (2014) 1-18

Authors:

collaboration LHCb, R Aaij, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, PA Cartelle, AA Alves, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, L Anderlini, J Anderson, R Andreassen, M Andreotti, M Andreotti, JE Andrews, RB Appleby, OA Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, MO Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, N Bondar, W Bonivento, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, M Britsch, T Britton, J Brodzicka, NH Brook, H Brown, A Bursche, G Busetto, G Busetto, J Buytaert, S Cadeddu, R Calabrese, R Calabrese, M Calvi

Abstract:

© 2014, The Author(s). Abstract: The direct CP asymmetries of the decays B0 → K*0μ+μ− and B+ → K+μ+μ− are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. The respective control modes B0 → J/ψK*0 and B+ → J/ψK+ are used to account for detection and production asymmetries. The measurements are made in several intervals of μ+μ− invariant mass squared, with the ϕ(1020) and charmonium resonance regions excluded. Under the hypothesis of zero CP asymmetry in the control modes, the average values of the asymmetries are (Formula Presented)where the first uncertainties are statistical and the second are due to systematic effects. Both measurements are consistent with the Standard Model prediction of small CP asymmetry in these decays.[Figure not available: see fulltext.]
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Measurement of CP asymmetries in the decays B0→ K*0μ+μ−and B+→ K+μ+μ−

Journal of High Energy Physics 2014:9 (2014)

Authors:

R Aaij, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, PA Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, J Anderson, R Andreassen, M Andreotti, JE Andrews, RB Appleby, OA Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, MO Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, M Britsch, T Britton, J Brodzicka, NH Brook, H Brown, A Bursche, G Busetto, J Buytaert, S Cadeddu, R Calabrese, M Calvi, MC Gomez, P Campana, DC Perez, A Carbone, G Carboni, R Cardinale, A Cardini, L Carson, KC Akiba

Abstract:

The direct CP asymmetries of the decays B0→ K*0μ+μ−and B+→ K+μ+μ−are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1collected with the LHCb detector. The respective control modes B0→ J/ψK*0and B+→ J/ψK+are used to account for detection and production asymmetries. The measurements are made in several intervals of μ+μ−invariant mass squared, with the ϕ(1020) and charmonium resonance regions excluded. Under the hypothesis of zero CP asymmetry in the control modes, the average values of the asymmetries are (Formula Presented) where the first uncertainties are statistical and the second are due to systematic effects. Both measurements are consistent with the Standard Model prediction of small CP asymmetry in these decays.
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Measurement of cp asymmetries in the decays b0 → k*0μ+μ- and b+ → k+μ+μ-

Journal of High Energy Physics 2014:177 (2014)

Authors:

R Aaij, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, J Anderson, R Andreassen, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, MO Bettler, M Van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi1, T Brambach, J Van Den Brand, J Bressieux, D Brett, M Britsch, T Britton, J Brodzicka, NH Brook, H Brown, A Bursche, G Busetto, J Buytaert, S Cadeddu, R Calabrese, M Calvi, M Calvo Gomez, P Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini, L Carson, K Carvalho Akiba, G Casse

Abstract:

The direct CP asymmetries of the decays B0 → K*0μ+μ- and B+ → K+μ+μ- are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb-1 collected with the LHCb detector. The respective control modes B0 → J/ψK*0 and B+ → J/ J/ψK+ are used to account for detection and production asymmetries. The measurements are made in several intervals of μ+μ- invariant mass squared, with the Ф(1020) and charmonium resonance regions excluded. Under the hypothesis of zero CP asymmetry in the control modes, the average values of the asymmetries are where the first uncertainties are statistical and the second are due to systematic effects. Both measurements are consistent with the Standard Model prediction of small CP asymmetry in these decays.

Measurement of polarization amplitudes and cp asymmetries in B0 → φK∗(892)0

Journal of High Energy Physics 2014:5 (2014)

Authors:

R Aaij, A Abba, A Abba, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, L Anderlini, J Anderson, R Andreassen, M Andreotti, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, V Balagura, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, TH Bauer, A Bay, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, MO Bettler, M Van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, N Bondar, W Bonivento, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J Van Den Brand, J Bressieux, D Brett, M Britsch, T Britton, NH Brook, H Brown, A Bursche, G Busetto, G Busetto, J Buytaert, S Cadeddu, R Calabrese, R Calabrese, O Callot, M Calvi

Abstract:

An angular analysis of the decay B0 → φK∗(892)0 is reported based on a pp collision data sample, corresponding to an integrated luminosity of 1.0 fb−1, collected at a centre-of-mass energy of √s = 7 TeV with the LHCb detector. The P-wave amplitudes and phases are measured with a greater precision than by previous experiments, and confirm about equal amounts of longitudinal and transverse polarization. The S-wave K+π− and K+K− contributions are taken into account and found to be significant. A comparison of the B0 → φK∗(892)0 and B0 → φK∗(892)0 results shows no evidence for direct CP violation in the rate asymmetry, in the triple-product asymmetries or in the polarization amplitudes and phases.
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