Improved Measurement of CP Violation Parameters in Bs0→J/ψK+K− Decays in the Vicinity of the ϕ(1020) Resonance
Academic Article
Publication Date:
2024
Short description:
(2024). Improved Measurement of CP Violation Parameters in Bs0→J/ψK+K− Decays in the Vicinity of the ϕ(1020) Resonance [journal article - articolo]. In PHYSICAL REVIEW LETTERS. Retrieved from https://hdl.handle.net/10446/283049
abstract:
The decay-time-dependent CP asymmetry in B0s -> J=psi(-> mu+mu-)K+K- decays is measured using proton-proton collision data, corresponding to an integrated luminosity of 6 fb-1, collected with the LHCb detector at a center-of-mass energy of 13 TeV. Using a sample of approximately 349 000 B0s signal decays with an invariant K+K- mass in the vicinity of the phi(1020) resonance, the CP-violating phase phi s is measured, along with the difference in decay widths of the light and heavy mass eigenstates of the B0s-B over bar 0s system, Delta Gamma s, and the difference of the average B0s and B0 meson decay widths, Gamma s - Gamma d. The values obtained are phi s = -0.039 +/- 0.022 +/- 0.006 rad, Delta Gamma s = 0.0845 +/- 0.0044 +/- 0.0024 ps-1, and -0.0015 +/- 0.0014 ps-1, where the first uncertainty is statistical and the second systematic. These are the most precise single measurements to date and are consistent with expectations based on the Standard Model and with the previous LHCb analyses of this decay. These results are combined with previous independent LHCb measurements. The phase phi s is also measured independently for each polarization state of the K+K- system and shows no evidence for polarization dependence.
Iris type:
1.1.01 Articoli/Saggi in rivista - Journal Articles/Essays
List of contributors:
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; Ajaltouni, Z.; Akar, S.; Akiba, K.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Aliouche, Z.; Alvarez Cartelle, P.; Amalric, R.; Amato, S.; Amey, J. L.; Amhis, Y.; An, L.; Anderlini, L.; Andersson, M.; Andreianov, A.; Andreola, P.; Andreotti, M.; Andreou, D.; Ao, D.; Archilli, F.; Artamonov, A.; Artuso, M.; Aslanides, E.; Atzeni, M.; Audurier, B.; Bacher, D.; Bachiller Perea, I.; Bachmann, S.; Bachmayer, M.; Back, J. J.; Bailly-reyre, A.; Baladron Rodriguez, P.; Balagura, V.; Baldini, W.; Baptista de Souza Leite, J.; Barbetti, M.; Barbosa, I. R.; Barlow, R. J.; Barsuk, S.; Barter, W.; Bartolini, M.; Baryshnikov, F.; Basels, J. M.; Bassi, G.; Batsukh, B.; Battig, A.; Bay, A.; Beck, A.; Becker, M.; Bedeschi, F.; Bediaga, I. B.; Beiter, A.; Belin, S.; Bellee, V.; Belous, K.; Belov, I.; Belyaev, I.; Benane, G.; Bencivenni, G.; Ben-Haim, E.; Berezhnoy, A.; Bernet, R.; Bernet Andres, S.; Berninghoff, D.; Bernstein, H. C.; Bertella, C.; Bertolin, A.; Betancourt, C.; Betti, F.; Bex, J.; Bezshyiko, Ia.; Bhom, J.; Bian, L.; Bieker, M. S.; Biesuz, N. V.; Billoir, P.; Biolchini, A.; Birch, M.; Bishop, F. C. R.; Bitadze, A.; Bizzeti, A.; Blago, M. P.; Blake, T.; Blanc, F.; Blank, J. E.; Blusk, S.; Bobulska, D.; Bocharnikov, V.; Boelhauve, J. A.; Boente Garcia, O.; Boettcher, T.; Bohare, A.; Boldyrev, A.; Bolognani, C. S.; Bolzonella, R.; Bondar, N.; Borgato, F.; Borghi, S.; Borsato, M.; Borsuk, J. T.; Bouchiba, S. A.; Bowcock, T. J. V.; Boyer, A.; Bozzi, C.; Bradley, M. J.; Braun, S.; Brea Rodriguez, A.; Breer, N.; Brodzicka, J.; Brossa Gonzalo, A.; Brown, J.; Brundu, D.; Buonaura, A.; Buonincontri, L.; Burke, A. T.; Burr, C.; Bursche, A.; Butkevich, A.; Butter, J. S.; Buytaert, J.; Byczynski, W.; Cadeddu, S.; Cai, H.; Calabrese, R.; Calefice, L.; Cali, S.; Calvi, M.; Calvo Gomez, M.; Cambon Bouzas, J.; Campana, P.; Campora Perez, D. H.; Campoverde Quezada, A. F.; Capelli, S.; Capriotti, L.; Carbone, A.; Carcedo Salgado, L.; Cardinale, R.; Cardini, A.; Carniti, P.; Carus, L.; Casais Vidal, A.; Caspary, R.; Casse, G.; Cattaneo, M.; Cavallero, G.; Cavallini, V.; Celani, S.; Cerasoli, J.; Cervenkov, D.; Chadwick, A. J.; Chahrour, I.; Chapman, M. G.; Charles, M.; Charpentier, Ph.; Chavez Barajas, C. A.; Chefdeville, M.; Chen, C.; Chen, S.; Chernov, A.; Chernyshenko, S.; Chobanova, V.; Cholak, S.; Chrzaszcz, M.; Chubykin, A.; Chulikov, V.; Ciambrone, P.; Cicala, M. F.; Cid Vidal, X.; Ciezarek, G.; Cifra, P.; Clarke, P. E. L.; Clemencic, M.; Cliff, H. V.; Closier, J.; Cobbledick, J. L.; Cocha Toapaxi, C.; Coco, V.; Cogan, J.; Cogneras, E.; Cojocariu, L.; Collins, P.; Colombo, T.; Comerma-Montells, A.; Congedo, L.; Contu, A.; Cooke, N.; Corredoira, I.; Correia, A.; Corti, G.; Cottee Meldrum, J. J.; Couturier, B.; Craik, D. C.; Cruz Torres, M.; Currie, R.; Da Silva, C. L.; Dadabaev, S.; Dai, L.; Dai, X.; Dall'Occo, E.; Dalseno, J.; D'Ambrosio, C.; Daniel, J.; Danilina, A.; D'Argent, P.; Davidson, A.; Davies, J. E.; Davis, A.; De Aguiar Francisco, O.; de Boer, J.; De Bruyn, K.; De Capua, S.; De Cian, M.; De Freitas Carneiro Da Graca, U.; De Lucia, E.; De Miranda, J. M.; De Paula, L.; De Serio, M.; De Simone, D.; De Simone, P.; De Vellis, F.; de Vries, J. A.; Dean, C. T.; Debernardis, F.; Decamp, D.; Dedu, V.; Del Buono, L.; Delaney, B.; Dembinski, H. -P.; Denysenko, V.; Deschamps, O.; Dettori, F.; Dey, B.; Di Nezza, P.; Diachkov, I.; Didenko, S.; Ding, S.; Dobishuk, V.; Docheva, A. D.; Dolmatov, A.; Dong, C.; Donohoe, A. M.; Dordei, F.; dos Reis, A. C.; Douglas, L.; Downes, A. G.; Duan, W.; Duda, P.; Dudek, M. W.; Dufour, L.; Duk, V.; Durante, P.; Duras, M. M.; Durham, J. M.; Dutta, D.; Dziurda, A.; Dzy
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