Measurement of B[sup 0]-[bar B][sup 0] flavor oscillations using jet-charge and lepton flavor tagging in p[bar p] collisions at [radical] (s) =1. 8 TeV

Journal Article · Fri Oct 01 00:00:00 EDT 1999 · Physical Review, D

OSTI ID:5908024

Blair, R E; Byrum, K L; Kovacs, E; Kuhlmann, S E; LeCompte, T; Nodulman, L ^[1]; Breccia, L; Brunetti, R; Deninno, M; Fiori, I; Mazzanti, P ^[2]; Behrends, S; Bensinger, J; Blocker, C; Kirk, M; Kirsch, L; Lamoureux, J I; Niu, H ^[3]; Bonushkin, Y; Hauser, J ; Lindgren, M ^[4]; Ashmanskas, W; Berryhill, J; Contreras, M; Culbertson, R; Grosso-Pilcher, C; Nakaya, T ^[5]; Benjamin, D; Cronin-Hennessy, D; Dittmann, J R; Goshaw, A T; Khazins, D; Kowald, W; Lee, IV, A M; Oh, S H ^[6]; Albrow, M G; Atac, M; Beretvas, A; Berge, J P; Biery, K; B,

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1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna (Italy)
3. Brandeis University, Waltham, Massachusetts 02254 (United States)
4. University of California at Los Angeles, Los Angeles, California 90024 (United States)
5. University of Chicago, Chicago, Illinois 60637 (United States)
6. Duke University, Durham, North Carolina 27708 (United States)

We present a measurement of the mass difference [Delta]m[sub d] for the B[sup 0] meson and the statistical power of the [ital b] flavor tagging methods used. The measurement uses 90 pb[sup [minus]1] of data from p[bar p] collisions at [radical] (s) =1.8 TeV collected with the CDF detector. An inclusive lepton trigger is used to collect a large sample of [ital B] hadron semileptonic decays. The mass difference [Delta]m[sub d] is determined from the proper time dependence of the fraction of [ital B] hadrons that undergo flavor oscillations. The flavor at decay is inferred from the charge of the lepton from semileptonic [ital B] decay. The initial flavor is inferred by determining the flavor of the other [ital B] hadron produced in the collision, either from its semileptonic decay (soft-lepton tag) or from its jet charge. The measurement yields [Delta]m[sub d]=(0.500[plus minus]0.052[plus minus]0.043)[h bar] ps[sup [minus]1], where the first uncertainty is statistical and the second uncertainty is systematic. The statistical powers ([epsilon]D[sup 2]) of the soft-lepton and jet-charge flavor taggers are (0.91[plus minus]0.10[plus minus]0.11)[percent] and (0.78[plus minus]0.12[plus minus]0.08)[percent], respectively. [copyright] [ital 1999] [ital The American Physical Society]

• OSTI ID: 5908024
• Journal Information: Physical Review, D, Vol. 60:7; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
B NEUTRAL MESONS
FLAVOR MODEL
JET MODEL
MASS
PARTICLE DECAY
PROTON-ANTIPROTON INTERACTIONS
BARYON-BARYON INTERACTIONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
COMPOSITE MODELS
DECAY
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MESONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PSEUDOSCALAR MESONS
QUARK MODEL
662340* - Hadron Interactions- (1992-)
662420 - Properties of Mesons & Meson Resonances- (1992-)