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Measurement of the $\Lambda^0_b$ lifetime in the decay $\Lambda^0_b \rightarrow J/\psi\Lambda^0$ with the DO detector

V.M. Abazov R. Abbott M. Abolins B.S. Acharya M. Adams T. Adams M. Agelou J.L. Agram 1 S.H. Ahn M. Ahsan G.D. Alexeev G. Alkhazov A. Alton G. Alverson G.A. Alves M. Anastasoaie S. Anderson B. Andrieu 2 Y. Arnoud 3 A. Askew B. Asman O. Atramentov C. Autermann C. Avila F. Badaud 4 A. Baden B. Baldin P.W. Balm S. Banerjee E. Barberis P. Bargassa P. Baringer C. Barnes J. Barreto J.F. Bartlett U. Bassler 2 D. Bauer A. Bean S. Beauceron 2 M. Begel A. Bellavance S.B. Beri G. Bernardi 2 R. Bernhard I. Bertram M. Besancon R. Beuselinck V.A. Bezzubov P.C. Bhat V. Bhatnagar M. Binder K.M. Black I. Blackler G. Blazey F. Blekman S. Blessing D. Bloch 1 U. Blumenschein A. Boehnlein O. Boeriu T.A. Bolton F. Borcherding G. Borissov K. Bos T. Bose A. Brandt R. Brock G. Brooijmans A. Bross N.J. Buchanam D. Buchholz M. Buehler V. Buescher S. Burdin T.H. Burnett Emmanuel Busato 2 J.M. Butler J. Bystricky W. Carvalho B.C.K. Casey N.M. Cason H. Castilla-Valdez S. Chakrabarti D. Chakraborty K.M. Chan A. Chandra D. Chapin F. Charles 1 E. Cheu L. Chevalier D.K. Cho S. Choi T. Christiansen L. Christofek D. Claes B. Clément 1 C. Clément Y. Coadou M. Cooke W.E. Cooper D. Coppage M. Corcoran J. Coss A. Cothenet 5 M.-C. Cousinou 5 S. Crépé-Renaudin 3 M. Cristetiu M.A.C. Cummings D. Cutts H. da Motta B. Davies G. Davies G.A. Davis K. De P. de Jong S.J. de Jong E. de la Cruz-Burelo C. de Oliveira Martins S. Dean F. Déliot P.-A. Delsart 6 M. Demarteau R. Demina P. Demine D. Denisov S.P. Denisov S. Desai H.T. Diehl M. Diesburg M. Doidge H. Dong S. Doulas L. Duflot 7 S.R. Dugad A. Duperrin 5 J. Dyer A. Dyshkant M. Eads D. Edmunds T. Edwards J. Ellison J. Elmsheuser J.T. Elzroth V.D. Elvira S. Eno P. Ermolov O.V. Eroshin J. Estrada D. Evans H. Evans A. Evdokimov V.N. Evdokimov J. Fast S.N. Fatakia L. Feligioni T. Ferbel F. Fiedler F. Filthaut W. Fisher H.E. Fisk M. Fortner H. Fox W. Freeman S. Fu S. Fuess T. Gadfort C.F. Galea E. Gallas E. Galyaev C. Garcia A. Garcia-Bellido J. Gardner V. Gravilov Pascal Gay 4 D. Gelé 1 R. Gelhaus K. Genser C.E. Gerber Y. Gershtein G. Ginther T. Golling B. Gomez K. Gounder A. Goussiou P.D. Grannis S. Greder 1 H. Greenlee Z.D. Greenwood E.M. Gregores Ph. Gris 4 J.-F. Grivaz 7 L. Groer S. Grünendahl M.W. Grünewald W. Gu S.N. Gurzhiev G. Gutierrez P. Gutierrez A. Haas N.J. Hadley S. Hagopian I. Hall R.E. Hall C. Han L. Han K. Hanagaki K. Harder R. Harrington J.M. Hauptman R. Hauser J. Hays T. Hebbeker D. Hedin J.M. Heinmiller A.P. Heinson U. Heintz C. Hensel G. Hesketh M.D. Hildreth R. Hirosky J.D. Hobbs B. Hoeneisen M. Hohlfeld S.J. Hong R. Hooper P. Houben Y. Hu J. Huang I. Iashvili R. Illingworth A.S. Ito S. Jabeen M. Jaffré 7 S. Jain V. Jain K. Jakobs A. Jenkins R. Jesik K. Johns M. Johnson A. Jonckheere P. Jonsson H. Jöstlein A. Juste M.M. Kado D. Käfer W. Kahl S. Kahn E. Kajfasz 5 A.M. Kalinin J. Kalk D. Karmanov J. Kasper D. Kau R. Kehoe S. Kermiche 5 S. Kesisoglou A. Khanov A. Kharchilava Y.M. Kharzheev K.H. Kim B. Klima M. Klute J.M. Kohli M. Kopal V. Korablev J. Kotcher B. Kothari A. Koubarovsky A.V. Kozelov J. Kozminski S. Krzywdzinski M. Kubantsev S. Kuleshov Y. Kulik S. Kunori A. Kupco T. Kurca 6 S. Lager N. Lahrichi G. Landsberg J. Lazoflores A.C. Le Bihan 1 P. Lebrun 6 S.W. Lee W.M. Lee A. Leflat F. Lehner C. Leonidopoulos P. Lewis J. Li Q.Z. Li J.G.R. Lima D. Lincoln S.I. Linn J. Linnemann V.V. Lipaev R. Lipton L. Lobo A. Lobodenko M. Lokajicek A. Lounis 1 H.J. Lubatti L. Lueking M. Lynker A.L. Lyon A.K.A. Maciel R.J. Madaras P. Mättig A. Magerkurth A.M. Magnan 3 N. Makovec P.K. Mal S. Malik V.L. Malyshev H.S. Mao Y. Maravin M. Martens S.E.K. Mattingly A.A. Mayorov R. Mccarthy R. Mccroskey D. Meder H.L. Melanson A. Melnitchouk M. Merkin K.W. Merritt A. Meyer C. Miao H. Miettinen D. Mihalcea J. Mitrevski N. Mokhov J. Molina N.K. Mondal H.E. Montgomery R.W. Moore G.-S. Muanza 6 M. Mulders Y.D. Mutaf E. Nagy 5 F. Nang M. Narain N.A. Naumann H.A. Neal J.P. Negret S. Nelson P. Neustroev C. Noeding A. Nomerotski S.F. Novaes T. Nunnemann E. Nurse D.C. O'Neil V. Oguri N. Oliveira N. Oshima G.J. Otero y Garzon P. Padley N. Parashar J. Park S.K. Park J. Parsons R. Partridge N. Parua A. Patwa P.M. Perea Emile Perez O. Peters P. Pétroff 7 M. Petteni L. Phaf R. Piegaia P.L.M. Podesta-Lerma V.M. Podstavkov Y. Pogorelov B.G. Pope W.L. Prado da Silva H.B. Prosper S. Protopopescu M.B. Przybycien J. Qian A. Quadt B. Quinn K.J. Rani P.A. Rapidis P.N. Ratoff N.W. Reay S. Reucroft M. Rijssenbeek I. Ripp-Baudot 1 F. Rizatdinova C. Royon P. Rubinov R. Ruchti G. Sajot 3 S. Sanchez-Hernandez M.P. Sanders A. Santoro G. Savage L. Sawyer T. Scanlon R.D. Schamberger H. Schellman P. Schieferdecker C. Schmitt A. Schukin A. Schwartzman R. Schwienhorst S. Sengupta H. Severini E. Shabalina V. Shamim V. Shary 7 W.D. Shephard D. Shpakov R.A. Sidwell V. Simak V. Sirotenko D. Skubic P. Slattery R.P. Smith K. Smolek G.R. Snow J. Snow S. Snyder S. Söldner-Rembold X. Song Y. Song L. Sonnenschein A. Sopczak M. Sosebee K. Soustruznik M. Souza B. Spurlock N.R. Stanton J. Stark 3 J. Steele G. Steinbrück K. Stevenson V. Stolin A. Stone D.A. Stoyanova J. Strandberg M.A. Strang M. Strauss R. Ströhmer M. Strovink L. Stutte S. Sumowidagdo A. Sznajder M. Talby 5 P. Tamburello W. Taylor P. Telford J. Temple S. Tentindo-Repond E. Thomas B. Thooris M. Tomoto T. Toole J. Torborg S. Towers T. Trefzger S. Trincaz-Duvoid B. Turchming C. Tully A.S. Turcot P.M. Tuts L. Uvarov S. Uvarov S. Uzunyan B. Vachon R. van Kooten W.M. van Leeuwen N. Varelas E.W. Varnes I.A. Vasilyev M. Vaupel P. Verdier 7 L.S. Vertogradov M. Verzocchi F. Villeneuve-Seguier 5 J.-R. Vlimant 2 E. von Toerne M. Vreeswijk T. Vu Anh 7 H.D. Wahl R. Walker L. Wang Z.-M. Wang J. Warchol M. Warsinsky G. Watts M. Wayne M. Weber H. Weerts M. Wegner N. Wermes A. White V. White D. Whiteson D. Wicke D.A. Wijngaarden G.W. Wilson S.J. Wimpenny J. Wittlin M. Wobisch J. Womersley D.R. Wood T.R. Wyatt Q. Xu N. Xuan R. Yamada M. Yan T. Yasuda Y.A. Yatsunenko Y. Yen K. Yip S.W. Youn J. Yu A. Yurkewicz A. Zabi 7 A. Zatserklyaniy M. Zdrazil C. Zeitnitz B. Zhang D. Zhang X. Zhang T. Zhao Z. Zhao B. Zhou J. Zhu M. Zielinski D. Zieminska A. Zieminski R. Zitoun V. Zutshi E.G. Zverev A. Zylberstejn
1 IReS - Institut de Recherches Subatomiques
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
4 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
5 CPPM - Centre de Physique des Particules de Marseille
6 IPNL - Institut de Physique Nucléaire de Lyon
7 LAL - Laboratoire de l'Accélérateur Linéaire
Abstract : We present measurements of the Lambda^0_b lifetime in the exclusive decay channel Lambda^0_{b}->J/psi Lambda^0, with J/psi to mu+ mu- and Lambda^0 to p pi-, the B^0 lifetime in the decay B^0 -> J/psi K^0_S with J/psi to mu+ mu- and K^0_S to pi+ pi-, and the ratio of these lifetimes. The analysis is based on approximately 250 pb^{-1} of data recorded with the D0 detector in pp(bar) collisions at sqrt{s}=1.96 TeV. The Lambda^0_b lifetime is determined to be tau(Lambda^0_b) = 1.22 +0.22/-0.18 (stat) +/- 0.04 (syst) ps, the B^0 lifetime tau(B^0) = 1.40 +0.11/-0.10 (stat) +/- 0.03 (syst) ps, and the ratio tau(Lambda^0_b)/tau(B^0) = 0.87 +0.17/-0.14 (stat) +/- 0.03 (syst). In contrast with previous measurements using semileptonic decays, this is the first determination of the Lambda^0_b lifetime based on a fully reconstructed decay channel.
Keywords : Lambda baryons baryon hadronic decay B mesons meson hadronic decay proton-proton inclusive interactions
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Journal articles
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http://hal.in2p3.fr/in2p3-00023273
Contributor : Yvette Heyd Connect in order to contact the contributor
Submitted on : Wednesday, November 10, 2004 - 3:20:42 PM
Last modification on : Monday, March 14, 2022 - 12:04:02 PM

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LAL | CNRS | CPPM | LPC-CLERMONT | LPSC | CGE | UNIV-PARIS7 | IN2P3 | UPMC | UNIV-AMU | PRES_CLERMONT | UNIV-LYON1 | SORBONNE-UNIVERSITE | IP2I | UDL | SITE-ALSACE | UNIV-PARIS | GEPI | UP-SCIENCES | UGA | SU-TI | UNIV-PARIS-SACLAY | LPNHE | SU-SCIENCES

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V.M. Abazov, R. Abbott, M. Abolins, B.S. Acharya, M. Adams, et al.. Measurement of the $\Lambda^0_b$ lifetime in the decay $\Lambda^0_b \rightarrow J/\psi\Lambda^0$ with the DO detector. Physical Review Letters, American Physical Society, 2005, 94, pp.102001-1-102001-7. ⟨10.1103/PhysRevLett.94.102001⟩. ⟨in2p3-00023273⟩

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