Measurement of the B semileptonic branching fraction with lepton tags.
نویسندگان
چکیده
B. Barish,1 M. Chadha,1 S. Chan,1 G. Eigen,1 J. S. Miller,1 C. O’Grady,1 J. Urheim,1 A. J. Weinstein,1 F. Würthwein,1 D. M. Asner,2 M. Athanas,2 D. W. Bliss,2 W. S. Brower,2 G. Masek,2 H. P. Paar,2 J. Gronberg,3 C. M. Korte,3 R. Kutschke,3 S. Menary,3 R. J. Morrison,3 S. Nakanishi,3 H. N. Nelson,3 T. K. Nelson,3 C. Qiao,3 J. D. Richman,3 D. Roberts,3 A. Ryd,3 H. Tajima,3 M. S. Witherell,3 R. Balest,4 K. Cho,4 W. T. Ford,4 M. Lohner,4 H. Park,4 P. Rankin,4 J. G. Smith,4 J. P. Alexander,5 C. Bebek,5 B. E. Berger,5 K. Berkelman,5 K. Bloom,5 T. E. Browder,5,* D. G. Cassel,5 H. A. Cho,5 D. M. Coffman,5 D. S. Crowcroft,5 M. Dickson,5 P. S. Drell,5 D. J. Dumas,5 R. Ehrlich,5 R. Elia,5 P. Gaidarev,5 B. Gittelman,5 S. W. Gray,5 D. L. Hartill,5 B. K. Heltsley,5 S. Henderson,5 C. D. Jones,5 S. L. Jones,5 J. Kandaswamy,5 N. Katayama,5 P. C. Kim,5 D. L. Kreinick,5 T. Lee,5 Y. Liu,5 G. S. Ludwig,5 J. Masui,5 J. Mevissen,5 N. B. Mistry,5 C. R. Ng,5 E. Nordberg,5 J. R. Patterson,5 D. Peterson,5 D. Riley,5 A. Soffer,5 P. Avery,6 A. Freyberger,6 K. Lingel,6 C. Prescott,6 J. Rodriguez,6 S. Yang,6 J. Yelton,6 G. Brandenburg,7 D. Cinabro,7 T. Liu,7 M. Saulnier,7 R. Wilson,7 H. Yamamoto,7 T. Bergfeld,8 B. I. Eisenstein,8 J. Ernst,8 G. E. Gladding,8 G. D. Gollin,8 M. Palmer,8 M. Selen,8 J. J. Thaler,8 K. W. Edwards,9 K. W. McLean,9 M. Ogg,9 A. Bellerive,10 D. I. Britton,10 E. R. F. Hyatt,10 R. Janicek,10 D. B. MacFarlane,10 P. M. Patel,10 B. Spaan,10 A. J. Sadoff,11 R. Ammar,12 P. Baringer,12 A. Bean,12 D. Besson,12 D. Coppage,12 N. Copty,12 R. Davis,12 N. Hancock,12 S. Kotov,12 I. Kravchenko,12 N. Kwak,12 Y. Kubota,13 M. Lattery,13 J. K. Nelson,13 S. Patton,13 R. Poling,13 T. Riehle,13 V. Savinov,13 R. Wang,13 M. S. Alam,14 I. J. Kim,14 Z. Ling,14 A. H. Mahmood,14 J. J. O’Neill,14 H. Severini,14 C. R. Sun,14 S. Timm,14 F. Wappler,14 J. E. Duboscq,15 R. Fulton,15 D. Fujino,15 K. K. Gan,15 K. Honscheid,15 H. Kagan,15 R. Kass,15 J. Lee,15 M. Sung,15 C. White,15 A. Wolf,15 M. M. Zoeller,15 X. Fu,16 B. Nemati,16 W. R. Ross,16 P. Skubic,16 M. Wood,16 M. Bishai,17 J. Fast,17 E. Gerndt,17 J. W. Hinson,17 T. Miao,17 D. H. Miller,17 M. Modesitt,17 E. I. Shibata,17 I. P. J. Shipsey,17 P. N. Wang,17 L. Gibbons,18 S. D. Johnson,18 Y. Kwon,18 S. Roberts,18 E. H. Thorndike,18 T. E. Coan,19 J. Dominick,19 V. Fadeyev,19 I. Korolkov,19 M. Lambrecht,19 S. Sanghera,19 V. Shelkov,19 T. Skwarnicki,19 R. Stroynowski,19 I. Volobouev,19 G. Wei,19 M. Artuso,20 M. Gao,20 M. Goldberg,20 D. He,20 N. Horwitz,20 S. Kopp,20 G. C. Moneti,20 R. Mountain,20 F. Muheim,20 Y. Mukhin,20 S. Playfer,20 S. Stone,20 X. Xing,20 J. Bartelt,21 S. E. Csorna,21 V. Jain,21 S. Marka,21 D. Gibaut,22 K. Kinoshita,22 P. Pomianowski,22 and S. Schrenk22
منابع مشابه
Semileptonic Branching Fraction and Hadronic Width of the B Mesons in Light of the New CLEO Observation of 13+ ~X
This talk reports the latest CLEO observation of ~ production in b decays, which provides new insight of the QCD interactions in heavy quark systems. The observed B semileptonic branching fraction has been significantly lower than QCD expectations, as was confirmed by recent lepton-lepton correlation studies at various experiments that removed most of the model dependence in previous generation...
متن کاملSemileptonic Decays of D and B Mesons, Part Ii Iv. B-meson Semileptonic Decays the Inclusive Semileptonic Branching Fraction
In the following sections, we discuss some of the key questions related to semileptonic decays of B mesons: the inclusive semileptonic branching fraction, the determination of jV cb j and jV ub j from inclusive and exclusive measurements, recent progress in exclusive semileptonic decays, and form factor measurements and tests of heavy-quark eeective theory. We emphasize the uncertainties that a...
متن کاملKEK Preprint 2002-81
We present a measurement of the electron spectrum from inclusive semileptonic B decay, using 5.1 fb−1 of Υ(4S) data collected with the Belle detector. A high-momentum lepton tag was used to separate the semileptonic B decay electrons from secondary decay electrons. We obtained the branching fraction, B(B → Xe+ν) = (10.90 ± 0.12 ± 0.49)%, with minimal model dependence. From this measurement, we ...
متن کاملRecent Results from CLEO on B Meson Decays
CLEO has made a number of important new B measurements over the past two years. I report here a new measurement of the inclusive branching fraction B(B ! X``) using lepton tags which has very small model uncertainties and provides the best upper limit yet for the fraction of non-BB decays of the (4S). New values for V cb and B(b ! c ! `) which result from this analysis are also reported. A numb...
متن کاملEuropean Organization for Nuclear Research Measurement of the Inclusive Charmless Semileptonic Branching Fraction of Beauty Hadrons and a Determination of Jv Ub J at Lep
A measurement of the inclusive charmless semileptonic branching fraction of beauty hadrons, b ! X u ``, has been performed using almost two million hadronic Z decays collected by the L3 experiment at LEP, yielding the result:
متن کاملdΓ/dq Spectra and Branching Fractions of Exclusive Semileptonic D Meson Decays
We study the exclusive semileptonic decays of D meson with the lepton mass effects into consideration, and obtain the dΓ/dq spectra and the branching fractions. We find that for the decay to a vector meson and a muon lepton pair (D → Kμν and D → ρμν) the dΓ/dq spectrum has a sharp peak at q = 0.022 GeV, and the branching fraction of the muon mode is substantially larger than that of the electro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 76 10 شماره
صفحات -
تاریخ انتشار 1996