Determination of heavy quark non-perturbative parametersfrom spectral moments in semileptonic B decays

被引：63

作者：

Abdallah, J.

Abreu, P.

Adam, W.

Adzic, P.

Albrecht, T.

Alderweireld, T.

Alemany-Fernandez, R.

Allmendinger, T.

Allport, P.

Amaldi, U.

Amapane, N.

Amato, S.

Anashkin, E.

Andreazza, A.

Andringa, S.

Anjos, N.

Antilogus, P.

Apel, W-D.

Arnoud, Y.

Ask, S.

Asman, B.

Augustin, E.

Augustinus, A.

Baillon, P.

Ballestrero, A.

Bambade, P.

Barbier, R.

Bardin, D.

Barker, J.

Baroncelli, A.

Battaglia, M.

Baubillier, M.

Becks, K-H.

Begalli, M.

Behrmann, A.

Ben-Haim, E.

Benekos, N.

Benvenuti, A.

Berat, C.

Berggren, M.

Berntzon, L.

Bertrand, D.

Besancon, M.

Besson, N.

Bloch, D.

Blom, M.

Bluj, M.

Bonesini, M.

Boonekamp, M.

Booth, L.

机构：

[1] Univ Paris 06, CNRS, IN2P3, LPNHE, F-75252 Paris 05, France

[2] Univ Paris 07, F-75252 Paris 05, France

[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[4] Univ Antwerp, Dept Phys, B-2610 Antwerp, Belgium

[5] ULB, VUB, IIHE, B-1050 Brussels, Belgium

[6] Univ Etat Mons, Fac Sci, B-7000 Mons, Belgium

[7] Univ Athens, Phys Lab, Athens 10680, Greece

[8] Univ Bergen, Dept Phys, N-5007 Bergen, Norway

[9] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy

[10] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[11] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil

[12] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil

[13] Univ Estado Rio De Janeiro, Inst Fis, Rio De Janeiro, Brazil

[14] CNRS, Phys Corpusculaire Lab, IN2P3, Coll France, F-75231 Paris 05, France

[15] CERN, CH-1211 Geneva 23, Switzerland

[16] ULP, CNRS, Inst Rech Subatom, IN2P3, F-67037 Strasbourg, France

[17] NCSR Demokritos, Inst Nucl Phys, Athens 15310, Greece

[18] FZU, Inst Phys, CAS, High Energy Phys Div, Prague 18040 8, Czech Republic

[19] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[20] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[21] Univ Grenoble 1, Inst Sci Nucl, IN2P3, CNRS, F-38026 Grenoble, France

[22] Univ Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[23] Univ Helsinki, Dept Phys Sci, FIN-00014 Helsinki, Finland

[24] Joint Inst Nucl Res, Moscow 101000, Russia

[25] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[26] PAN, Inst Nucl Phys, Krakow, Poland

[27] Univ Min & Met Krakow, Fac Phys & Nucl Tech, PL-30055 Krakow, Poland

[28] Univ Paris 11, Lab Accelerateur Lineaire, IN2P3, CNRS, F-91405 Orsay, France

[29] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England

[30] LIP, IST, FCUL, P-1000 Lisbon, Portugal

[31] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[32] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[33] Lund Univ, Dept Phys, S-22363 Lund, Sweden

[34] Univ Lyon 1, IPNL, IN2P3, CNRS, F-69622 Villeurbanne, France

[35] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[36] Ist Nazl Fis Nucl, I-20133 Milan, Italy

[37] Univ Milan, Dipartimento Fis, I-20126 Milan, Italy

[38] Ist Nazl Fis Nucl, I-20126 Milan, Italy

[39] Charles Univ Prague, IPNP, MFF, Areal MFF, Prague 18000 8, Czech Republic

[40] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

[41] Natl Tech Univ Athens, Dept Phys, Athens 15773, Greece

[42] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[43] Univ Oviedo, Dept Fis, Oviedo 33007, Spain

[44] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[45] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[46] Ist Nazl Fis Nucl, I-35131 Padua, Italy

[47] Rutherford Appleton Lab, Chilton OX11 OQX, England

[48] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[49] Ist Nazl Fis Nucl, I-00173 Rome, Italy

[50] Univ Roma 3, Dipartimento Fis, I-00146 Rome, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 2006年 / 45卷 / 01期

关键词：

D O I：

10.1140/epjc/s2005-02406-7

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：

Moments of the hadronic invariant mass and of the lepton energy spectra in semileptonic B decays have been determined with the data recorded by the DELPHI detector at LEP. From measurements of the inclusive b-hadron semileptonic decays, and imposing constraints from other measurements on b- and c-quark masses, the first three moments of the lepton energy distribution and of the hadronic mass distribution, have been used to determine parameters which enter into the extraction of vertical bar V-cb vertical bar from the measurement of the inclusive b-hadron semileptonic decay width. The values obtained in the kinetic scheme are: m(b)(1 GeV) = 4.591 +/- 0.062 +/- 0.039 +/- 0.005 GeV/c(2), m(c)(1 GeV) = 1.170 +/- 0.093 +/- 0.055 +/- 0.005 GeV/c(2), m(pi)(2) (1 GeV) = 0.399 +/- 0.048 +/- 0.034 +/- 0.087 GeV2, (p) over tilde (3)(D) = 0.053 +/- 0.017 +/- 0.011 +/- 0.026 GeV3, and include corrections at order 1/m(b)(3). Using these results, and present measurements of the inclusive semileptonic decay partial width of b-hadrons at LEP, an accurate determination of vertical bar V-cb vertical bar is obtained: vertical bar V-cb vertical bar = 0.0421 x (1 +/- 0.014 (meas center dot) +/- 0.014 (fit) +/- 0.015 (th center dot)).

引用

页码：35 / 59

页数：25

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