Observation of the B_s^0 → D *± D ∓ decay
R. Aaij,C. Abellán Beteta,T. Ackernley,B. Adeva,M. Adinolfi,H. Afsharnia,C. A. Aidala,S. Aiola,Z. Ajaltouni,S. Akar,J. Albrecht,F. Alessio,M. Alexander,A. Alfonso Albero,Z. Aliouche,G. Alkhazov,P. Alvarez Cartelle,S. Amato,Y. Amhis,L. An,L. Anderlini,A. Andreianov,M. Andreotti,F. Archilli,A. Artamonov,M. Artuso,K. Arzymatov,E. Aslanides,M. Atzeni,B. Audurier,S. Bachmann,M. Bachmayer,J. J. Back,S. Baker,P. Baladron Rodriguez,V. Balagura,W. Baldini,J. Baptista Leite,R. J. Barlow,S. Barsuk,W. Barter,M. Bartolini,F. Baryshnikov,J. M. Basels,G. Bassi,B. Batsukh,A. Battig,A. Bay,M. Becker,F. Bedeschi,I. Bediaga,A. Beiter,V. Belavin,S. Belin,V. Bellee,K. Belous,I. Belov,I. Belyaev,G. Bencivenni,E. Ben-Haim,A. Berezhnoy,R. Bernet,D. Berninghoff,H. C. Bernstein,C. Bertella,E. Bertholet,A. Bertolin,C. Betancourt,F. Betti,M. O. Bettler,Ia. Bezshyiko,S. Bhasin,J. Bhom,L. Bian,M. S. Bieker,S. Bifani,P. Billoir,M. Birch,F. C. R. Bishop,A. Bizzeti,M. Bjørn,M. P. Blago,T. Blake,F. Blanc,S. Blusk,D. Bobulska,J. A. Boelhauve,O. Boente Garcia,T. Boettcher,A. Boldyrev,A. Bondar,N. Bondar,S. Borghi,M. Borisyak,M. Borsato,J. T. Borsuk,S. A. Bouchiba,T. J. V. Bowcock,A. Boyer,C. Bozzi,M. J. Bradley,S. Braun,A. Brea Rodriguez,M. Brodski,J. Brodzicka,A. Brossa Gonzalo,D. Brundu,A. Buonaura,C. Burr,A. Bursche,A. Butkevich,J. S. Butter,J. Buytaert,W. Byczynski,S. Cadeddu,H. Cai,R. Calabrese,L. Calefice,L. Calero Diaz,S. Cali,R. Calladine,M. Calvi,M. Calvo Gomez,P. Camargo Magalhaes,A. Camboni,P. Campana,D. H. Campora Perez,A. F. Campoverde Quezada,S. Capelli,L. Capriotti,A. Carbone,G. Carboni,R. Cardinale,A. Cardini,I. Carli,P. Carniti,L. Carus,K. Carvalho Akiba,A. Casais Vidal,G. Casse,M. Cattaneo,G. Cavallero,S. Celani,J. Cerasoli,A. J. Chadwick,M. G. Chapman,M. Charles,Ph. Charpentier,G. Chatzikonstantinidis,C. A. Chavez Barajas,M. Chefdeville,C. Chen,S. Chen,A. Chernov,S.-G. Chitic,V. Chobanova,S. Cholak,M. Chrzaszcz,A. Chubykin,V. Chulikov,P. Ciambrone,M. F. Cicala,X. Cid Vidal,G. Ciezarek,P. E. L. Clarke,M. Clemencic,H. V. Cliff,J. Closier,J. L. Cobbledick,V. Coco,J. A. B. Coelho,J. Cogan,E. Cogneras,L. Cojocariu,P. Collins,T. Colombo,L. Congedo,A. Contu,N. Cooke,G. Coombs,G. Corti,C. M. Costa Sobral,B. Couturier,D. C. Craik,J. Crkovská,M. Cruz Torres,R. Currie,C. L. Da Silva,E. Dall’Occo,J. Dalseno,C. D’Ambrosio,A. Danilina,P. d’Argent,A. Davis,O. De Aguiar Francisco,K. De Bruyn,S. De Capua,M. De Cian,J. M. De Miranda,L. De Paula,M. De Serio, D. De Simone,P. De Simone,J. A. de Vries,C. T. Dean,W. Dean,D. Decamp,L. Del Buono,B. Delaney,H.-P. Dembinski,A. Dendek,V. Denysenko,D. Derkach,O. Deschamps,F. Desse,F. Dettori,B. Dey,P. Di Nezza,S. Didenko,L. Dieste Maronas,H. Dijkstra,V. Dobishuk,A. M. Donohoe,F. Dordei,A. C. dos Reis,L. Douglas,A. Dovbnya,A. G. Downes,K. Dreimanis,M. W. Dudek,L. Dufour,V. Duk,P. Durante,J. M. Durham,D. Dutta,M. Dziewiecki,A. Dziurda,A. Dzyuba,S. Easo, U. Egede,V. Egorychev,S. Eidelman,S. Eisenhardt,S. Ek-In,L. Eklund,S. Ely,A. Ene,E. Epple,S. Escher,J. Eschle,S. Esen,T. Evans,A. Falabella,J. Fan,Y. Fan,B. Fang,N. Farley,S. Farry,D. Fazzini,P. Fedin,M. Féo,P. Fernandez Declara,A. Fernandez Prieto,J. M. Fernandez-tenllado Arribas,F. Ferrari,L. Ferreira Lopes,F. Ferreira Rodrigues,S. Ferreres Sole,M. Ferrillo,M. Ferro-Luzzi,S. Filippov,R. A. Fini,M. Fiorini,M. Firlej,K. M. Fischer,C. Fitzpatrick,T. Fiutowski, F. Fleuret,M. Fontana,F. Fontanelli,R. Forty,V. Franco Lima,M. Franco Sevilla,M. Frank,E. Franzoso,G. Frau,C. Frei,D. A. Friday,J. Fu,Q. Fuehring,W. Funk,E. Gabriel,T. Gaintseva,A. Gallas Torreira,D. Galli,S. Gambetta,Y. Gan,M. Gandelman,P. Gandini,Y. Gao,M. Garau,L. M. Garcia Martin,P. Garcia Moreno,J. García Pardiñas,B. Garcia Plana,F. A. Garcia Rosales,L. Garrido,C. Gaspar,R. E. Geertsema,D. Gerick,L. L. Gerken,E. Gersabeck,M. Gersabeck,T. Gershon,D. Gerstel,Ph. Ghez,V. Gibson,M. Giovannetti,A. Gioventù,P. Gironella Gironell,L. Giubega,C. Giugliano,K. Gizdov,E. L. Gkougkousis,V. V. Gligorov,C. Göbel,E. Golobardes,D. Golubkov,A. Golutvin,A. Gomes,S. Gomez Fernandez,F. Goncalves Abrantes,M. Goncerz,G. Gong,P. Gorbounov,I. V. Gorelov,C. Gotti,E. Govorkova,J. P. Grabowski,R. Graciani Diaz,T. Grammatico,L. A. Granado Cardoso,E. Graugés,E. Graverini,G. Graziani,A. Grecu,L. M. Greeven,P. Griffith,L. Grillo,S. Gromov,B. R. Gruberg Cazon,C. Gu,M. Guarise,P. A. Günther,E. Gushchin,A. Guth,Y. Guz,T. Gys,T. Hadavizadeh,G. Haefeli,C. Haen,J. Haimberger,T. Halewood-leagas,P. M. Hamilton,Q. Han,X. Han,T. H. Hancock,S. Hansmann-Menzemer,N. Harnew,T. Harrison,C. Hasse,M. Hatch,J. He,M. Hecker,K. Heijhoff,K. Heinicke,A. M. Hennequin,K. Hennessy,L. Henry,J. Heuel,A. Hicheur,D. Hill,M. Hilton,S. E. Hollitt,J. Hu,J. Hu,W. Hu,W. Huang,X. Huang,W. Hulsbergen, R. J. Hunter,M. Hushchyn,D. Hutchcroft,D. Hynds, P. Ibis,M. Idzik, D. Ilin,P. Ilten, A. Inglessi, A. Ishteev,K. Ivshin, R. Jacobsson,S. Jakobsen,E. Jans,B. K. Jashal,A. Jawahery,V. Jevtic, M. Jezabek,F. Jiang,M. John,D. Johnson,C. R. Jones,T. P. Jones,B. Jost, N. Jurik,S. Kandybei,Y. Kang,M. Karacson,M. Karpov,N. Kazeev,F. Keizer,M. Kenzie,T. Ketel,B. Khanji, A. Kharisova,S. Kholodenko,K. E. Kim,T. Kirn,V. S. Kirsebom,O. Kitouni,S. Klaver, K. Klimaszewski,S. Koliiev,A. Kondybayeva, A. Konoplyannikov,P. Kopciewicz, R. Kopecna,P. Koppenburg, M. Korolev, I. Kostiuk, O. Kot,S. Kotriakhova,P. Kravchenko,L. Kravchuk,R. D. Krawczyk,M. Kreps, F. Kress, S. Kretzschmar,P. Krokovny,W. Krupa,W. Krzemien,W. Kucewicz,M. Kucharczyk,V. Kudryavtsev,H. S. Kuindersma,G. J. Kunde,T. Kvaratskheliya,D. Lacarrere,G. Lafferty,A. Lai,A. Lampis,D. Lancierini,J. J. Lane,R. Lane,G. Lanfranchi,C. Langenbruch,J. Langer,O. Lantwin,T. Latham,F. Lazzari,R. Le Gac,S. H. Lee,R. Lefèvre, A. Leflat, S. Legotin,O. Leroy,T. Lesiak, B. Leverington,H. Li,L. Li, P. Li,X. Li,Y. Li, Y. Li, Z. Li,X. Liang,T. Lin,R. Lindner,V. Lisovskyi,R. Litvinov,G. Liu,H. Liu,S. Liu,X. Liu,A. Loi,J. Lomba Castro,I. Longstaff,J. H. Lopes, G. Loustau,G. H. Lovell,Y. Lu,D. Lucchesi,S. Luchuk,M. Lucio Martinez,V. Lukashenko,Y. Luo,A. Lupato,E. Luppi,O. Lupton,A. Lusiani,X. Lyu,L. Ma,R. Ma,S. Maccolini,F. Machefert,F. Maciuc,V. Macko,P. Mackowiak,S. Maddrell-Mander,O. Madejczyk,L. R. Madhan Mohan,O. Maev,A. Maevskiy,D. Maisuzenko,M. W. Majewski,J. J. Malczewski,S. Malde, B. Malecki,A. Malinin, T. Maltsev, H. Malygina, G. Manca,G. Mancinelli,R. Manera Escalero, D. Manuzzi,D. Marangotto,J. Maratas,J. F. Marchand,U. Marconi,S. Mariani,C. Marin Benito,M. Marinangeli,P. Marino,J. Marks,P. J. Marshall,G. Martellotti,L. Martinazzoli,M. Martinelli,D. Martinez Santos,F. Martinez Vidal,A. Massafferri, M. Materok,R. Matev, A. Mathad,Z. Mathe,V. Matiunin,C. Matteuzzi,K. R. Mattioli,A. Mauri,E. Maurice, J. Mauricio,M. Mazurek,M. McCann, L. Mcconnell,T. H. Mcgrath, A. McNab,R. McNulty,J. V. Mead,B. Meadows,C. Meaux,G. Meier,N. Meinert,D. Melnychuk,S. Meloni,M. Merk,A. Merli, L. Meyer Garcia,M. Mikhasenko,D. A. Milanes,E. Millard,M. Milovanovic,M.-N. Minard, L. Minzoni,S. E. 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JOURNAL OF HIGH ENERGY PHYSICS(2021)
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摘要
A search for the B_s^0 → D *± D ∓ decay is performed using proton-proton collision data at centre-of-mass energies of 7, 8 and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb − 1 . The decay is observed with a high significance and its branching fraction relative to the B 0 → D *± D ∓ decay is measured to be ℬ(B_s^0→D^∗±D^∓)/(B^0→D^∗±D^∓)=0.137± 0.017± 0.002± 0.006, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B_s^0 and B 0 hadronisation fractions.
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关键词
B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments)
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