Measurement of the {ital B}{sup +} and {ital B}{sup 0} Lifetimes Using Topological Reconstruction of Inclusive and Semileptonic Decays

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Physical Review Letters

OSTI ID:628678

Steiner, R ^[1]; Benvenuti, A C ^[2]; Coller, J A; Hedges, S J; Johnson, A S; Shank, J T; Whitaker, J S ^[3]; Allen, N J; Cotton, R; Dervan, P J; Hasan, A; McKemey, A K; Watts, S J ^[4]; Caldwell, D O; Lu, A; Yellin, S J ^[5]; Cavalli-Sforza, M; Coyne, D G; Fernandez, J P; Liu, X ; Reinertsen, P L; Schalk, T; Schumm, B A; Williams, D A ^[6]; DOliveira, A; Johnson, R A; Meadows, B T; Nussbaum, M ^[7]; Dima, M; Harton, J L; Smy, M B; Wilson, R J ^[8]; Baranko, G; Fahey, S; Fan, C; Krishna, N M; Lauber, J A; Nauenberg, U; Wagner, D L ^[9]; Bazarko, A O; Bolton, T; Rowson, P C; Shaevitz, M H ^[10]; Camanzi, B; Mazzucato, E; Piemontese, L ^[11]; Calcaterra, A; De Sangro, R; Peruzzi, I; Piccolo, M ^[12]; Eisenstein, B I; Gladding, G; Karliner, I ^[13]; Shapiro, G; Steiner, H ^[14]; Bardon, O; Burrows, P N; Busza, W; Cowan, R F; Dong, D N; Fero, M J; Gonzalez, S; Kendall, H W; Lath, A; Lia, V; Osborne, L S; Quigley, J; Taylor, F E; Torrence, E; Verdier, R; Williams, D C; others, and

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1. Adelphi University, Garden City, New York 11530 (United States)
2. INFN Sezione di Bologna, I-40126 Bologna (Italy)
3. Boston University, Boston, Massachusetts 02215 (United States)
4. Brunel University, Uxbridge, Middlesex UB8 3PH (United Kingdom)
5. University of California at Santa Barbara, Santa Barbara, California 93106 (United States)
6. University of California at Santa Cruz, Santa Cruz, California 95064 (United States)
7. University of Cincinnati, Cincinnati, Ohio 45221 (United States)
8. Colorado State University, Fort Collins, Colorado 80523 (United States)
9. University of Colorado, Boulder, Colorado 80309 (United States)
10. Columbia University, New York, New York 10027 (United States)
11. INFN Sezione di Ferrara and Universita di Ferrara, I-44100 Ferrara (Italy)
12. INFN Laboratori Nazionali di Frascati, I-00044 Frascati (Italy)
13. University of Illinois, Urbana, Illinois 61801 (United States)
14. Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States)

The lifetimes of B{sup +} and B{sup 0} mesons are measured using a sample of 150000hadronic Z{sup 0} decays collected by the SLD experiment at the SLAC Linear Collider between 1993 and 1995. Two analyses are presented in which the decay length and charge of the {ital B} meson are reconstructed. The first method uses a novel topological vertexing technique while the second uses semi-inclusively reconstructed semileptonic decays. The topological analysis yields a sample of 6033 (3665) charged (neutral) vertices with good charge purity, whereas the semileptonic analysis yields a smaller sample of 634 (584) charged (neutral) decays with excellent charge purity. Combining the results from both analyses, we find {tau}{sub B{sup +}}=1.66{plus_minus}0.06(stat ){plus_minus}0.05(syst) ps, {tau}{sub B{sup 0}}=1.64{plus_minus}0.08(stat ){plus_minus}0.08(syst) ps, and {tau}{sub B{sup +}}/{tau}{sub B{sup 0}} =1.01{plus_minus}0.07(stat){plus_minus}0.06( syst) . {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 628678
• Journal Information: Physical Review Letters, Vol. 79, Issue 4; Other Information: PBD: Jul 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
B MESONS
LIFETIME
Z NEUTRAL BOSONS
WEAK HADRONIC DECAY
STANFORD LINEAR COLLIDER DETECTOR
SEMILEPTONIC DECAY
KOBAYASHI-MASKAWA MATRIX
TOPOLOGY