Measurement of the fragmentation fraction ratio fs/fd and its dependence on B meson kinematics

被引：87

作者：

Aaij, R. ^{[39
]}

Abellan Beteta, C. ^{[34
,72
]}

Adametz, A. ^{[11
]}

Adeva, B. ^{[35
]}

Adinolfi, M. ^{[44
]}

Adrover, C. ^{[6
]}

Affolder, A. ^{[50
]}

Ajaltouni, Z. ^{[5
]}

Albrecht, J. ^{[36
]}

Alessio, F. ^{[36
]}

Alexander, M. ^{[49
]}

Ali, S. ^{[39
]}

Alkhazov, G. ^{[27
]}

Alvarez Cartelle, P. ^{[35
]}

Alves, A. A., Jr. ^{[22
,36
]}

Amato, S. ^{[2
]}

Amhis, Y. ^{[7
]}

Anderlini, L. ^{[17
,64
]}

Anderson, J. ^{[38
]}

Andreassen, R. ^{[58
]}

Appleby, R. B. ^{[52
]}

Gutierrez, O. Aquines ^{[10
]}

Archilli, F. ^{[18
]}

Artamonov, A. ^{[33
]}

Artuso, M. ^{[54
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[22
,71
]}

Bachmann, S. ^{[11
]}

Back, J. J. ^{[46
]}

Baesso, C. ^{[55
]}

Balagura, V. ^{[28
]}

Baldini, W. ^{[16
]}

Barlow, R. J. ^{[52
]}

Barschel, C. ^{[36
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[45
]}

Bates, A. ^{[49
]}

Bauer, Th ^{[39
]}

Bay, A. ^{[37
]}

Beddow, J. ^{[49
]}

Bediaga, I. ^{[1
]}

Belogurov, S. ^{[28
]}

Belous, K. ^{[33
]}

Belyaev, I. ^{[28
]}

Ben-Haim, E. ^{[8
]}

Benayoun, M. ^{[8
]}

Bencivenni, G. ^{[18
]}

Benson, S. ^{[48
]}

Benton, J. ^{[44
]}

Berezhnoy, A. ^{[29
]}

机构：

[1] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil

[3] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China

[4] Univ Savoie, LAPP, CNRS, IN2P3, Annecy Le Vieux, France

[5] Univ Blaise Pascal, Clermont Univ, LPC, CNRS,IN2P3, Clermont Ferrand, France

[6] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France

[7] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France

[8] Univ Paris Diderot, Univ Paris 06, LPNHE, CNRS,IN2P3, Paris, France

[9] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[10] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[11] Heidelberg Univ, Inst Phys, Heidelberg, Germany

[12] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland

[13] Sez INFN Bari, Bari, Italy

[14] Sez INFN Bologna, Bologna, Italy

[15] Sez INFN Cagliari, Cagliari, Italy

[16] Sez INFN Ferrara, Ferrara, Italy

[17] Sez INFN Firenze, Florence, Italy

[18] Lab Nazl INFN Frascati, Frascati, Italy

[19] Sez INFN Genova, Genoa, Italy

[20] Sez INFN Milano Bicocca, Milan, Italy

[21] Sez INFN Roma Tor Vergata, Rome, Italy

[22] Sez INFN Roma La Sapienza, Rome, Italy

[23] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[24] AGH Univ Sci & Technol, Krakow, Poland

[25] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

[26] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[27] Petersburg Nucl Phys Inst, Gatchina, Russia

[28] Inst Theoret & Expt Phys, Moscow 117259, Russia

[29] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia

[30] Russian Acad Sci INR RAN, Inst Nucl Res, Moscow, Russia

[31] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia

[32] Novosibirsk State Univ, Novosibirsk 630090, Russia

[33] Inst High Energy Phys, Protvino, Russia

[34] Univ Barcelona, Barcelona, Spain

[35] Univ Santiago de Compostela, Santiago De Compostela, Spain

[36] European Org Nucl Res CERN, Geneva, Switzerland

[37] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

[38] Univ Zurich, Inst Phys, Zurich, Switzerland

[39] Nikhef Natl Inst Subatom Phys, Amsterdam, Netherlands

[40] Vrije Univ Amsterdam, Amsterdam, Netherlands

[41] NSC Kharkiv Inst Phys & Technol, Kharkov, Ukraine

[42] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine

[43] Univ Birmingham, Birmingham, W Midlands, England

[44] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[45] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[46] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[47] STFC Rutherford Appleton Lab, Didcot, Oxon, England

[48] Univ Edinburgh, Sch Phys & Astron, Edinburgh, Midlothian, Scotland

[49] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland

[50] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 3BX, Merseyside, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2013年 / 04期

关键词：

Hadron-Hadron Scattering; Branching fraction; B physics; Flavor physics;

D O I：

10.1007/JHEP04(2013)001

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The relative production rate of B-s(0) and B-0 mesons is determined with the hadronic decays B-s(0) -> D-s(-)pi(+) and B-0 -> D- K+. The measurement uses data corresponding to 1.0 fb(-1) of pp collisions at a centre-of-mass energy of root s = 7 TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, f(s)/f(d), is measured to be 0.238 +/- 0.004 +/- 0.015 +/- 0.021, where the first uncertainty is statistical, the second systematic, and the third theoretical. This is combined with a previous LHCb measurement to obtain f(s)/f(d) = 0.256 +/- 0.020. The dependence of f(s)/f(d) on the transverse momentum and pseudorapidity of the B meson is determined using the decays B-s(0) -> D-s(-)pi(+) and B-0 -> D-pi(+). There is evidence for a decrease with increasing transverse momentum, whereas the ratio remains constant as a function of pseudorapidity. In addition, the ratio of branching fractions of the decays B-0 -> D-K+ and B-0 -> D-pi(+) is measured to be 0.0822 +/- 0.0011 (stat) +/- 0.0025 (syst).

引用

页数：17

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