Measurement of b hadron fractions in 13 TeV pp collisions
R. Aaij,C. Abellan Beteta,B. Adeva,M. Adinolfi, C. A. Aidala, Z. Ajaltouni,S. Akar,P. Albicocco,J. Albrecht, F. Alessio,M. Alexander,A. Alfonso Albero,G. Alkhazov,P. Alvarez Cartelle,Jr. Alves A. A.,S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. Andreassi, M. Andreotti,J. E. Andrews,F. Archilli,J. Arnau Romeu, A. Artamonov,M. Artuso, K. Arzymatov, E. Aslanides,M. Atzeni, B. Audurier,S. Bachmann,J. J. Back,S. Baker,V. Balagura,W. Baldini,A. Baranov, R. J. Barlow,G. C. Barrand, S. Barsuk,W. Barter,M. Bartolini,F. Baryshnikov, V. Batozskaya, B. Batsukh, A. Battig, V. Battista, A. Bay, J. Beddow,F. Bedeschi, I. Bediaga, A. Beiter, L. J. Bel,S. Belin,N. Beliy, V. Bellee, N. Belloli, K. Belous, I. Belyaev, G. Bencivenni, E. Ben-Haim, S. Benson,S. Beranek, A. Berezhnoy,R. Bernet, D. Berninghoff, E. Bertholet, A. Bertolin,C. Betancourt,F. Betti,M. O. Bettler,Ia. Bezshyiko,S. Bhasin, J. Bhom,M. S. Bieker,S. Bifani, P. Billoir, A. Birnkraut, A. Bizzeti,M. Bjorn,M. P. Blago,T. Blake,F. Blanc,S. Blusk, D. Bobulska,V. Bocci,O. Boente Garcia,T. Boettcher,A. Bondar, N. Bondar, S. Borghi,M. Borisyak,M. Borsato,M. Boubdir,T. J. V. Bowcock,C. Bozzi,S. Braun, M. Brodski, J. Brodzicka,A. Brossa Gonzalo,D. Brundu, E. Buchanan, A. Buonaura,C. Burr, A. Bursche, J. Buytaert,W. Byczynski,S. Cadeddu,H. Cai,R. Calabrese, R. Calladine, M. Calvi,M. Calvo Gomez,A. Camboni,P. Campana,D. H. Campora Perez,L. Capriotti,A. Carbone,G. Carboni,R. Cardinale, A. Cardini, P. Carniti,K. Carvalho Akiba,G. Casse,M. Cattaneo, G. Cavallero, R. Cenci,D. Chamont,M. G. Chapman,M. Charles,Ph. Charpentier,G. Chatzikonstantinidis, M. Chefdeville,V. Chekalina,C. Chen,S. Chen,S. -G. Chitic,V. Chobanova, M. Chrzaszcz, A. Chubykin, P. Ciambrone,X. Cid Vidal, G. Ciezarek,F. Cindolo, P. E. L. Clarke, M. Clemencic, H. V. Cliff, J. Closier,V. Coco,J. A. B. Coelho,J. Cogan, E. Cogneras,L. Cojocariu,P. Collins, T. Colombo, A. Comerma-Montells,A. Contu,G. Coombs, S. Coquereau,G. Corti,M. Corvo,C. M. Costa Sobral, B. Couturier,G. A. Cowan,D. C. Craik, A. Crocombe,M. Cruz Torres,R. Currie,F. Da Cunha Marinho,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,P. De Simone,J. A. De Vries,C. T. Dean,W. Dean, D. Decamp,L. Del Buono,B. Delaney,H. -P. Dembinski,M. Demmer, A. Dendek,D. Derkach, O. Deschamps, F. Desse,F. Dettori,B. Dey,A. Di Canto,P. Di Nezza,S. Didenko,H. Dijkstra,F. Dordei,M. Dorigo,A. C. Dos Reis,A. Dosil Suarez, L. Douglas, A. Dovbnya,K. Dreimanis,L. Dufour, G. Dujany, P. Durante,J. M. Durham,D. Dutta, R. Dzhelyadin,M. Dziewiecki,A. Dziurda, A. Dzyuba, S. Easo,U. Egede,V. Egorychev,S. Eidelman,S. Eisenhardt, U. Eitschberger, R. Ekelhof, L. Eklund,S. Ely, A. Ene,S. Escher,S. Esen,T. Evans, A. Falabella, C. Farber, N. Farley, S. Farry,D. Fazzini,M. Feo,P. Fernandez Declara,A. Fernandez Prieto,F. Ferrari,L. Ferreira Lopes,F. Ferreira Rodrigues, M. Ferro-Luzzi,S. Filippov,R. A. Fini,M. Fiorini,M. Firlej, C. Fitzpatrick,T. Fiutowski,F. Fleuret,M. Fontana, F. Fontanelli, R. Forty,V. Franco Lima,M. Frank, C. Frei,J. Fu, W. Funk,E. Gabriel,A. Gallas Torreira,D. Galli,S. Gallorini,S. Gambetta,Y. Gan,M. Gandelman, P. Gandini,Y. Gao,L. M. Garcia Martin,J. Garcia Pardinas,B. Garcia Plana,J. Garra Tico, L. Garrido,D. Gascon, C. Gaspar, G. Gazzoni, D. Gerick,E. Gersabeck,M. Gersabeck, T. Gershon,D. Gerstel,Ph. Ghez,V. Gibson,O. G. Girard,P. Gironella Gironell, L. Giubega,K. Gizdov,V. V. Gligorov,C. Gobel, D. Golubkov,A. Golutvin,A. Gomes, I. V. Gorelov, C. Gotti,E. Govorkova,J. P. Grabowski,R. Graciani Diaz,L. A. Granado Cardoso,E. Grauges,E. Graverini, G. Graziani,A. Grecu, R. Greim,P. Griffith, L. Grillo,L. Gruber,B. R. Gruberg Cazon,O. Grunberg,C. Gu, E. Gushchin,A. Guth,Yu. Guz, T. Gys,T. Hadavizadeh,C. Hadjivasiliou, G. Haefeli, C. Haen,S. C. Haines,B. Hamilton,X. Han,T. H. Hancock, S. Hansmann-Menzemer, N. Harnew,T. Harrison,C. Hasse, M. Hatch,J. He,M. Hecker,K. Heinicke, A. Heister, K. Hennessy,L. Henry,M. Hess,J. Heuel, A. Hicheur,R. Hidalgo Charman,D. Hill,M. Hilton, P. H. Hopchev,J. Hu,W. Hu,W. Huang,Z. C. Huard,W. Hulsbergen,T. Humair,M. Hushchyn, D. Hutchcroft,D. Hynds,P. Ibis,M. Idzik,P. Ilten, A. Inglessi, A. Inyakin,K. Ivshin, R. Jacobsson,S. Jakobsen, J. Jalocha, E. Jans,B. K. Jashal,A. Jawahery,F. Jiang,M. John,D. Johnson,C. R. Jones, C. Joram,B. Jost,N. Jurik,S. Kandybei, M. Karacson,J. M. Kariuki,S. Karodia,N. Kazeev,M. Kecke, F. Keizer,M. Kelsey,M. Kenzie,T. Ketel, E. Khairullin, B. Khanji, C. Khurewathanakul,K. E. Kim,T. Kirn,V. S. Kirsebom,S. Klaver,K. Klimaszewski, T. Klimkovich,S. Koliiev, M. Kolpin,R. Kopecna,P. Koppenburg,I. Kostiuk,S. Kotriakhova, M. Kozeiha, L. Kravchuk, M. Kreps, F. Kress,P. Krokovny,W. Krupa,W. Krzemien,W. Kucewicz, M. Kucharczyk,V. Kudryavtsev,A. K. Kuonen, T. Kvaratskheliya, D. Lacarrere, G. Lafferty,A. Lai, D. Lancierini, G. Lanfranchi, C. Langenbruch,T. Latham,C. Lazzeroni,R. Le Gac, R. Lef Evre, A. Leflat,F. Lemaitre,O. Leroy,T. Lesiak, B. Leverington, P. -R. Li,Y. Li,Z. Li,X. Liang,T. Likhomanenko,R. Lindner, F. Lionetto,V. Lisovskyi,G. Liu,X. Liu,D. Loh,A. Loi, I. Longstaff,J. H. Lopes,G. Loustau, G. H. Lovell,D. Lucchesi,M. Lucio Martinez,Y. Luo,A. Lupato, E. Luppi,O. Lupton,A. Lusiani,X. Lyu, F. Machefert, F. Maciuc,V. Macko,P. Mackowiak,S. Maddrell-Mander, O. Maev,K. Maguire,D. Maisuzenko,M. W. Majewski,S. Malde,B. Malecki, A. Malinin,T. Maltsev,H. Malygina,G. Manca,G. Mancinelli,D. Marangotto,J. Maratas,J. F. Marchand, U. Marconi,C. Marin Benito,M. Marinangeli,P. Marino,J. Marks,P. J. Marshall, G. Martellotti,M. Martinelli,D. Martinez Santos,F. Martinez Vidal, A. Massafferri, M. Materok, R. Matev, A. Mathad, Z. Mathe, C. Matteuzzi,K. R. Mattioli,A. Mauri,E. Maurice, B. Maurin, M. McCann, A. Mcnab,R. McNulty,J. V. Mead, B. Meadows, C. Meaux, N. Meinert,D. Melnychuk, M. Merk, A. Merli, E. Michielin,D. A. Milanes,E. Millard,M. -N. 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Tellarini,F. Teubert,E. Thomas,M. J. Tilley,V. Tisserand,S. T'Jampens,M. Tobin, S. Tolk,L. Tomassetti,D. Tonelli,D. Y. Tou,R. Tourinho Jadallah Aoude, E. Tournefier, M. Traill,M. T. Tran,A. Trisovic,A. Tsaregorodtsev,G. Tuci,A. Tully,N. Tuning,A. Ukleja,A. Usachov,A. Ustyuzhanin,U. Uwer,A. Vagner,V. Vagnoni,A. Valassi,S. Valat,G. Valenti,M. Van Beuzekom,E. Van Herwijnen,J. Van Tilburg,M. Van Veghel,R. Vazquez Gomez,P. Vazquez Regueiro,C. Vazquez Sierra,S. Vecchi,J. J. Velthuis,M. Veltri,A. Venkateswaran,M. Vernet, M. Veronesi,M. Vesterinen,J. V. Viana Barbosa,D. Vieira,M. Vieites Diaz,H. Viemann,X. Vilasis-Cardona, A. Vitkovskiy, M. Vitti,V. Volkov, A. Vollhardt,D. Vom Bruch, B. Voneki,A. Vorobyev,V. Vorobyev,N. Voropaev,R. Waldi, J. Walsh,J. Wang,M. Wang,Y. Wang,Z. Wang,D. R. Ward,H. M. Wark,N. K. Watson,D. Websdale, A. Weiden,C. Weisser,M. Whitehead,G. Wilkinson,M. Wilkinson,I. Williams,M. Williams,M. R. J. Williams,T. Williams,F. F. Wilson, M. Winn,W. Wislicki,M. Witek,G. Wormser,S. A. Wotton,K. Wyllie, D. Xiao,Y. Xie,A. Xu,M. Xu,Q. Xu,Z. Xu,Z. Yang,Y. Yao,L. E. Yeomans, H. Yin,J. Yu,X. Yuan,O. Yushchenko,K. A. Zarebski,M. Zavertyaev,D. Zhang,L. Zhang,W. C. Zhang,Y. Zhang,A. Zhelezov,Y. Zheng,X. Zhu,V. Zhukov,J. B. Zonneveld,S. Zucchelli
arxiv（2019）
引用 107|浏览50
摘要
The production fractions of (B) over bar (0)(s) and Lambda(0)(b) hadrons, normalized to the sum of B- and (B) over bar (0) fractions, arc measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity of 1.67 fb(-1). These ratios, averaged over the b hadron transverse momenta from 4 to 25 GeV and pseudorapidity from 2 to 5, are 0.122 +/- 0.006 for (B) over bar (0)(s) and 0.259 +/- 0.018 for Lambda(0)(b) where the uncertainties arise from both statistical and systematic sources. The Lambda(0)(b) ratio depends strongly on transverse momentum, while the (B) over bar (0)(s) ratio shows a mild dependence. Neither ratio shows variations with pseudorapidity. The measurements are made using semileptonic decays to minimize theoretical uncertainties. In addition, the ratio of D+ to D-0 mesons produced in the sum of (B) over bar (0) and B- semileptonic decays is determined as 0.359 +/- 0.006 +/- 0.009, where the uncertainties are statistical and systematic.
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