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Measurement of fs/fu Variation with Proton-Proton Collision Energy and B -Meson Kinematics

descriptionPublicationkeyboard_double_arrow_right Article , Research , Preprint , Journal 26 Mar 2020Embargo end date: 01 Jan 2019 Italy, Germany, Spain, Italy, Switzerland, Netherlands, Spain, Italy, Italy, United Kingdom, Germany, Italy, Italy, United States, Italy, Spain, Italy, Italy, Spain, Italy, Spain, Netherlands, Spain, Italy, France, Germany, Italy, Italy, Italy, Italy Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 124 (issn: 0031-9007, eissn: 1079-7114,

Authors: LHCb collaboration; Aaij, R.; Beteta, C. Abellán; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; +193 Authors

LHCb collaboration; Aaij, R.; Beteta, C. Abellán; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C. A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Albero, A. Alfonso; Alkhazov, G.; Cartelle, P. Alvarez; Alves Jr, A. A.; Amato, S.; Amhis, Y.; An, L.; Anderlini, L.; Andreassi, G.; Andreotti, M.; Archilli, F.; Romeu, J. Arnau; Artamonov, A.; Artuso, M.; Arzymatov, K.; Aslanides, E.; Atzeni, M.; Audurier, B.; Bachmann, S.; Back, J. J.; Baker, S.; Balagura, V.; Baldini, W.; Baranov, A.; Barlow, R. J.; Barsuk, S.; Barter, W.; Bartolini, M.; Baryshnikov, F.; Bassi, G.; Batozskaya, V.; Batsukh, B.; Battig, A.; Bay, A.; Becker, M.; Bedeschi, F.; Bediaga, I.; Beiter, A.; Bel, L. J.; Belavin, V.; Belin, S.; Beliy, N.; Bellee, V.; Belous, K.; Belyaev, I.; Bencivenni, G.; Ben-Haim, E.; Benson, S.; Beranek, S.; Berezhnoy, A.; Bernet, R.; Berninghoff, D.; Bernstein, H. C.; Bertella, C.; Bertholet, E.; Bertolin, A.; Betancourt, C.; Betti, F.; Bettler, M. O.; Bezshyiko, Ia.; Bhasin, S.; Bhom, J.; Bieker, M. S.; Bifani, S.; Billoir, P.; Bizzeti, A.; Bjørn, M.; Blago, M. P.; Blake, T.; Blanc, F.; Blusk, S.; Bobulska, D.; Bocci, V.; Garcia, O. Boente; Boettcher, T.; Boldyrev, A.; Bondar, A.; Bondar, N.; Borghi, S.; Borisyak, M.; Borsato, M.; Borsuk, J. T.; Bowcock, T. J. V.; Bozzi, C.; Bradley, M. J.; Braun, S.; Rodriguez, A. Brea; Brodski, M.; Brodzicka, J.; Gonzalo, A. Brossa; Brundu, D.; Buchanan, E.; Buonaura, A.; Burr, C.; Bursche, A.; Butter, J. S.; Buytaert, J.; Byczynski, W.; Cadeddu, S.; Cai, H.; Calabrese, R.; Diaz, L. Calero; Cali, S.; Calladine, 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.; Akiba, K. Carvalho; Vidal, A. Casais; Casse, G.; Cattaneo, M.; Cavallero, G.; Celani, S.; Cenci, R.; Cerasoli, J.; Chapman, M. G.; Charles, M.; Charpentier, Ph.; Chatzikonstantinidis, G.; Chefdeville, M.; Chekalina, V.; Chen, C.; Chen, S.; Chernov, A.; Chitic, S. -G.; Chobanova, V.; Chrzaszcz, M.; Chubykin, A.; Ciambrone, P.; Cicala, M. F.; Vidal, X. Cid; Ciezarek, G.; Cindolo, F.; Clarke, P. E. L.; Clemencic, M.; Cliff, H. V.; Closier, J.; Cobbledick, J. L.; Coco, V.; Coelho, J. A. B.; Cogan, J.; Cogneras, E.; Cojocariu, L.; Collins, P.; Colombo, T.; Comerma-Montells, A.; Contu, A.; Cooke, N.; Coombs, G.; Coquereau, S.; Corti, G.; Sobral, C. M. Costa; Couturier, B.; Craik, D. C.; Crkovska, J.; Crocombe, A.; Torres, M. Cruz; Currie, R.; Da Silva, C. L.; Dall'Occo, E.; Dalseno, J.; D'Ambrosio, C.; Danilina, A.; d'Argent, P.; Davis, A.; Francisco, O. De Aguiar; De Bruyn, K.; De Capua, S.; De Cian, M.; De Miranda, J. M.; De Paula, L.; De Serio, M.; De Simone, P.; de Vries, J. A.; Dean, C. T.; Dean, W.; Decamp, D.;

doi: 10.1103/physrevlett.124.122002 , 10.18154/rwth-2020-07346 , 10.48550/arxiv.1910.09934 , 10.18154/rwth-2020-05583 , 10.3204/pubdb-2021-00645

pmid: 32281875

arXiv: http://arxiv.org/abs/1910.09934 , 1910.09934

Measurement of fs/fu Variation with Proton-Proton Collision Energy and B -Meson Kinematics

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Abstract

The ratio of the $\mathrm{B}^0_\mathrm{s}$ and $\mathrm{B}^+$ fragmentation fractions $f_\mathrm{s}$ and $f_u$ is studied with $B^0_\mathrm{s}\to\mathrm{J}/��$ and $B^+\to\mathrm{J}/��K^+$ decays using data collected by the LHCb experiment in proton-proton collisions at 7, 8 and 13$\text{ TeV}$ center-of-mass energies. The analysis is performed in bins of $\mathrm{B}$-meson momentum, longitudinal momentum, transverse momentum, pseudorapidity and rapidity. The fragmentation-fraction ratio $f_\mathrm{s} / f_u$ is observed to depend on the $\mathrm{B}$-meson transverse momentum with a significance of $6.0\,��$. This dependency is driven by the 13$\text{ TeV}$ sample ($8.7\,��$) while the results for the other collision energies are not significant when considered separately. Furthermore the results show a $4.8\,��$ evidence for an increase of $f_\mathrm{s} / f_u$ as a function of collision energy.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-020.html (LHCb public pages)

Countries

Italy, Germany, Spain, Italy, Switzerland, Netherlands, Spain, Italy, Italy, United Kingdom, Germany, Italy, Italy, United States, Italy, Spain, Italy, Italy, Spain, Italy, Spain, Netherlands, Spain, Italy, France, Germany, Italy, Italy, Italy, Italy

Related Organizations

Pontifical Catholic University of Rio de Janeiro
Brazil
Spanish National Research Council
Spain
Institute for Theoretical and Experimental Physics
Russian Federation
Los Alamos National Laboratory
United States
Sapienza University of Rome
Italy

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Keywords

ratio, J/psi(3100), Kinematics, transverse momentum dependence, 09 Engineering, decay, High Energy Physics - Experiment, rapidity dependence, S051.3, High Energy Physics - Experiment (hep-ex), S051.1, fragmentation, scattering [p p], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Gran col·lisionador d'hadrons (França i Suïssa), LHCb - Abteilung Hinton, 7000 GeV-cms8000 GeV-cms13000 GeV-cms, info:eu-repo/classification/ddc/530, Multidisciplinary, 02 Physical Sciences, Physics, Settore FIS/01 - Fisica Sperimentale, QUARK, Settore FIS/01 - FISICA SPERIMENTALE, hadronic decay [B/s0], CERN LHC Coll, To be checked by Faculty, kinematics, Physical Sciences, colliding beams [p p], Protons, LHCb Collaboration, General Physics, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics, Multidisciplinary, FOS: Physical sciences, Physics; HEP; LHC; LHCb; Particles and fields; Particle production; Particle decays; Strong interaction; Branching fractions; Fragmentation into hadrons; Hadron-hadron interactions; Hadron colliders;, Cinemàtica, Physics and Astronomy(all), K+, 530, Partícules (Física nuclear), energy dependence, quark, RATIO, 539, Library approved, Mesons (Nuclear physics), SDG 7 - Affordable and Clean Energy, Mesons (Física nuclear), 01 Mathematical Sciences, lhcb, longitudinal momentum: dependence, Science & Technology, hep-ex, Phi(1020), 541, LHC-B, 620, B physics; Hadron-Hadron scattering (experiments); Heavy quark production; Spectroscopy, LHCb, fractions, Col·lisions (Física nuclear), B+: hadronic decay, 539 - Constitució física de la matèria, Elementary Particles and Fields, B/s0: hadronic decay, hadronic decay [B+], DECAY, p p: colliding beams, FRACTIONS, dependence [longitudinal momentum], experimental results

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