measurement of b 0_s and d _s meson lifetimes

• DOI: 10.48550/arxiv.1705.03475
• Publication Date: 2017-09-08
• Authors: LHCb collaboration; Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P. Alvarez; Alves Jr, A. A.; Amato, S.; Amerio, S.; Amhis, Y.; An, L.; Anderlini, L.; Andreassi, G.; Andreotti, M.; Andrews, J. E.; Appleby, R. B.; Archilli, F.; d'Argent, P.; Romeu, J. Arnau; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Baalouch, M.; Babuschkin, I.; Bachmann, S.; Back, J. J.; Badalov, A.; Baesso, C.; Baker, S.; Balagura, V.; Baldini, W.; Baranov, A.; Barlow, R. J.; Barschel, C.; Barsuk, S.; Barter, W.; Baryshnikov, F.; Baszczyk, M.; Batozskaya, V.; Batsukh, B.; Battista, V.; Bay, A.; Beaucourt, L.; Beddow, J.; Bedeschi, F.; Bediaga, I.; Beiter, A.; Bel, L. J.; Bellee, V.; Belloli, N.; Belous, K.; Belyaev, I.; Ben-Haim, E.; Bencivenni, G.; Benson, S.; Beranek, S.; Berezhnoy, A.; Bernet, R.; Bertolin, A.; Betancourt, C.; Betti, F.; Bettler, M. -O.; van Beuzekom, M.; Bezshyiko, Ia.; Bifani, S.; Billoir, P.; Birnkraut, A.; Bitadze, A.; Bizzeti, A.; Blake, T.; Blanc, F.; Blouw, J.; Blusk, S.; Bocci, V.; Boettcher, T.; Bondar, A.; Bondar, N.; Bonivento, W.; Bordyuzhin, I.; Borgheresi, A.; Borghi, S.; Borisyak, M.; Borsato, M.; Bossu, F.; Boubdir, M.; Bowcock, T. J. V.; Bowen, E.; Bozzi, C.; Braun, S.; Britton, T.; Brodzicka, J.; Buchanan, E.; Burr, C.; Bursche, A.; Buytaert, J.; Cadeddu, S.; Calabrese, R.; Calvi, M.; Gomez, M. Calvo; Camboni, A.; Campana, P.; Perez, D. H. Campora; Capriotti, L.; Carbone, A.; Carboni, G.; Cardinale, R.; Cardini, A.; Carniti, P.; Carson, L.; Akiba, K. Carvalho; Casse, G.; Cassina, L.; Garcia, L. Castillo; Cattaneo, M.; Cavallero, G.; Cenci, R.; Chamont, D.; Charles, M.; Charpentier, Ph.; Chatzikonstantini...; Chefdeville, M.; Chen, S.; Cheung, S. -F.; Chobanova, V.; Chrzaszcz, M.; Chubykin, A.; Vidal, X. Cid; Ciezarek, G.; Clarke, P. E. L.; Clemencic, M.; Cliff, H. V.; Closier, J.; Coco, V.; Cogan, J.; Cogneras, E.; Cogoni, V.; Cojocariu, L.; Collins, P.; Comerma-Montells, A.; Contu, A.; Cook, A.; Coombs, G.; Coquereau, S.; Corti, G.; Corvo, M.; Sobral, C. M. Costa; Couturier, B.; Cowan, G. A.; Craik, D. C.; Crocombe, A.; Torres, M. Cruz; Cunliffe, S.; Currie, R.; D'Ambrosio, C.; Marinho, F. Da Cunha; Dall'Occo, E.; Dalseno, J.; David, P. N. Y.; Davis, A.; De Bruyn, K.; De Capua, S.; De Cian, M.; De Miranda, J. M.; De Paula, L.; De Serio, M.; De Simone, P.; Dean, C. T.; Decamp, D.; Deckenhoff, M.; Del Buono, L.; Dembinski, H. -P.; Demmer, M.; Dendek, A.; Derkach, D.; Deschamps, O.; Dettori, F.; Dey, B.; Di Canto, A.; Di Nezza, P.; Dijkstra, H.; Dordei, F.; Dorigo, M.; Suárez, A. Dosil; Dovbnya, A.; Dreimanis, K.; Dufour, L.; Dujany, G.; Dungs, K.; Durante, P.; Dzhelyadin, R.; Dziewiecki, M.; Dziurda, A.; Dzyuba, A.; Ebert, M.; Egede, U.; Egorychev, V.; Eisenhardt, S.; Eklund, L.; Esen, S.; Rodrigues, F. Fer...; Filippov, S.; Fiorini, M.; Firlej, M.; Fitzpatrick, C.; Fiutowski, T.; Fontanelli, F.; Frei, C.; Torreira, A. Gallas; Galli, D.; Gandini, P.; Pardiñas, J. García; Garrido, L.; Gascon, D.; Gersabeck, E.; Gligorov, V. V.; Golutvin, A.; Gorelov, I. V.; Gotti, C.; Diaz, R. Graciani; Graugés, E.; Graverini, E.; Grecu, A.; Cazon, B. R. Gruberg; Hadavizadeh, T.; Hutchcroft, D.; Idzik, M.; Ilten, P.; Kandybei, S.; Kenzie, M.; Klaver, S.; Koppenburg, P.; Kotriakhova, S.; Krzemien, W.; Kucharczyk, M.; Kudryavtsev, V.; Lafferty, G.; Lai, A.; Latham, T.; Lazzeroni, C.; Gac, R. Le; Lefèvre, R.; Cid, E. Lemos; Leroy, O.; Lesiak, T.; Lucchesi, D.; Lupato, A.; Luppi, E.; Lupton, O.; Lusiani, A.; Maltsev, T.; Manca, G.; Mancinelli, G.; Maratas, J.; Marchand, J. F.; Benito, C. Marin; Marino, P.; Martinelli, M.; Santos, D. Martinez; Vidal, F. Martinez; Massafferri, A.; Matev, R.; Matteuzzi, C.; Mauri, A.; Melnychuk, D.; Merli, A.; Michielin, E.; Milanes, D. A.; Mitzel, D. S.; Morello, M. J.; Moron, J.; Mulder, M.; Nasteva, I.; Needham, M.; Neri, N.; Oblakowska-Mucha, A.; Obraztsov, V.; Oldeman, R.; Onderwater, C. J. G.; Owen, P.; Oyanguren, A.; Pappalardo, L. L.; Parkes, C.; Passaleva, G.; Patrignani, C.; Perazzini, S.; Petridis, K.; Petrolini, A.; Petrov, A.; Petruzzo, M.; Olloqui, E. Picat...; Pistone, A.; Poluektov, A.; Popovici, B.; Prouve, C.; Navarro, A. Puig; Punzi, G.; Pernas, M. Ramos; Rangel, M. S.; Raven, G.; Redi, F.; Rodrigues, E.; Lopez, J. A. Rodr...; Roiser, S.; Vidal, A. Romero; Rotondo, M.; Rudolph, M. S.; Silva, J. J. Sabo...; Sadykhov, E.; Saitta, B.; Santacesaria, R.; Santimaria, M.; Santovetti, E.; Sarti, A.; Satriano, C.; Schiller, M.; Schindler, H.; Schmelling, M.; Schneider, O.; Schubiger, M.; Sciubba, A.; Sergi, A.; Serra, N.; Serrano, J.; Sestini, L.; Seyfert, P.; Shapoval, I.; Simi, G.; Smith, E.; Soler, F. J. P.; Steinkamp, O.; Stevens, H.; Stone, S.; Szumlak, T.; van Tilburg, J.; Tisserand, V.; Tomassetti, L.; Tonelli, D.; Trabelsi, K.; Trisovic, A.; Tsaregorodtsev, A.; Tully, A.; Ukleja, A.; Ustyuzhanin, A.; Gomez, R. Vazquez; Vecchi, S.; Veltri, M.; Diaz, M. Vieites; Vorobyev, V.; de Vries, J. A.; Sierra, C. Vázquez; Wark, H. M.; Watson, N. K.; Wilkinson, M.; Williams, M.; Wilson, F. F.; Winn, M. A.; Witek, M.; Yang, Z.; Zavertyaev, M.; Zhang, Y.
• Keywords: B/s0: semileptonic decay; B/s0 --> D/s- muon+ neutrino/mu; 01 natural sciences; 09 Engineering; Physics, Particles & Fields; High Energy Physics - Experiment; High Energy Physics - Experiment (hep-ex); S086TFS; [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; S034T; 8000 GeV-cms; Multidisciplinary; 02 Physical Sciences; Physics; Particle physics; 3100 General Physics and Astronomy; CERN LHC Coll; Physics, Nuclear; kinematics; 7000 GeV-cms; Physical Sciences; Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE; p p: scattering; LHCb Collaboration; General Physics; [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]; width: difference; 530 Physics; Particles & Fields; Physics, Multidisciplinary; FOS: Physical sciences; 10192 Physics Institute; Astronomy & Astrophysics; B/s0: width; 530; Bottom mesons, Charmed mesons; DECAYS; Physics and Astronomy (all); B/s0: lifetime: measured; 0103 physical sciences; Nuclear; SDG 7 - Affordable and Clean Energy; 01 Mathematical Sciences; Science & Technology; PHYSICS, MULTIDISCIPLINARY; hep-ex; HEP; LHC; LHCb; Leptonic, semileptonic and radiative decays; Lifetimes and widths; Bottom Mesons; Charmed Mesons;; LHC-B; LHCb; D/s: width; D/s: lifetime; Física de partícules; Experiments; p p: colliding beams; experimental results

We report on a measurement of the flavor-specific $B^{0}_{s}$ lifetime and of the $D^{-}_{s}$ lifetime using proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to 3.0 fb$^{-1}$ of integrated luminosity. Approximately 407 000 $B^{0}_{s} \rightarrow D^{(*)-}_{s} ��^{+}��_��$ decays are partially reconstructed in the $K^{+}K^{-}��^{-}��^{+}$ final state. The $B^{0}_{s}$ and $D^{-}_{s}$ natural widths are determined using, as a reference, kinematically similar $B^{0} \rightarrow D^{(*)-}��^{+}��_��$ decays reconstructed in the same final state. The resulting differences between widths of $B^{0}_{s}$ and $B^{0}$ mesons and of $D^{-}_{s}$ and $D^{-}$ mesons are $��_��(B) =-0.0115 \pm 0.0053 (stat) \pm 0.0041 (syst)$ ps$^{-1}$ and $��_��(D) = 1.0131 \pm 0.0117 (stat) \pm 0.0065 (syst)$ ps$^{-1}$, respectively. Combined with the known $B^{0}$ and $D^{-}$ lifetimes, these yield the flavor-specific $B^{0}_{s}$ lifetime, $��^{\rm fs}_{B^{0}_{s}} = 1.547 \pm 0.013 (stat) \pm 0.010 (syst) \pm 0.004 (��_{B})$ ps and the $D^{-}_{s}$ lifetime, $��_{D^{-}_{s}} = 0.5064 \pm 0.0030 (stat) \pm 0.0017 (syst) \pm 0.0017 (��_{D})$ ps The last uncertainties originate from the limited knowledge of the $B^0$ and $D^{-}$ lifetimes. The results improve upon current determinations.<br/>16 pages, 8 figures. Minor editorial changes to match the published version. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-004.html<br/>