Measurement of the B+ and B-0 lifetimes using topological reconstruction of inclusive and semileptonic decays

被引：24

作者：

Abe, K ^{[20
]}

Akagi, T

Allen, NJ

Ash, WW

Aston, D

Baird, KG

Baltay, C

Band, HR

Barakat, MB

Baranko, G

Bardon, O

Barklow, TL

Bashindzhagyan, GL

Bazarko, AO

BenDavid, R

Benvenuti, AC

Bilei, GM

Bisello, D

Blaylock, G

Bogart, JR

Bolen, B

Bolton, T

Bower, GR

Brau, JE

Breidenbach, M

Bugg, WM

Burke, D

Burnett, TH

Burrows, PN

Busza, W

Calcaterra, A

Caldwell, DO

Calloway, D

Camanzi, B

Carpinelli, M

Cassell, R

Castaldi, R

Castro, A

CavalliSforza, M

Chou, A

Church, E

Cohn, HO

Coller, JA

Cook, V

Cotton, R

Cowan, RF

Coyne, DG

Crawford, G

DOliveira, A

机构：

[1] ADELPHI UNIV, GARDEN CITY, NY 11530 USA

[2] IST NAZL FIS NUCL, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY

[3] BOSTON UNIV, BOSTON, MA 02215 USA

[4] BRUNEL UNIV, UXBRIDGE UB8 3PH, MIDDX, ENGLAND

[5] UNIV CALIF SANTA BARBARA, SANTA BARBARA, CA 93106 USA

[6] UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA

[7] UNIV CINCINNATI, CINCINNATI, OH 45221 USA

[8] COLORADO STATE UNIV, FT COLLINS, CO 80523 USA

[9] UNIV COLORADO, BOULDER, CO 80309 USA

[10] COLUMBIA UNIV, NEW YORK, NY 10027 USA

[11] IST NAZL FIS NUCL, SEZ FERRARA, I-44100 FERRARA, ITALY

[12] UNIV FERRARA, I-44100 FERRARA, ITALY

[13] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY

[14] UNIV ILLINOIS, URBANA, IL 61801 USA

[15] UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA

[16] MIT, CAMBRIDGE, MA 02139 USA

[17] UNIV MASSACHUSETTS, AMHERST, MA 01003 USA

[18] UNIV MISSISSIPPI, UNIVERSITY, MS 38677 USA

[19] MOSCOW MV LOMONOSOV STATE UNIV, INST NUCL PHYS, MOSCOW 119899, RUSSIA

[20] NAGOYA UNIV, CHIKUSA KU, NAGOYA, AICHI 464, JAPAN

[21] UNIV OREGON, EUGENE, OR 97403 USA

[22] IST NAZL FIS NUCL, SEZ PADOVA, I-35100 PADUA, ITALY

[23] UNIV PADUA, I-35100 PADUA, ITALY

[24] UNIV PERUGIA, I-06100 PERUGIA, ITALY

[25] IST NAZL FIS NUCL, SEZ PERUGIA, I-06100 PERUGIA, ITALY

[26] UNIV PISA, I-56100 PISA, ITALY

[27] IST NAZL FIS NUCL, SEZ PISA, I-56100 PISA, ITALY

[28] RUTGERS STATE UNIV, PISCATAWAY, NJ 08855 USA

[29] RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND

[30] SOGANG UNIV, SEOUL, SOUTH KOREA

[31] SOONGSIL UNIV, SEOUL 156743, SOUTH KOREA

[32] STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA

[33] UNIV TENNESSEE, KNOXVILLE, TN 37996 USA

[34] TOHOKU UNIV, SENDAI, MIYAGI 980, JAPAN

[35] VANDERBILT UNIV, NASHVILLE, TN 37235 USA

[36] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[37] UNIV WISCONSIN, MADISON, WI 53706 USA

[38] YALE UNIV, NEW HAVEN, CT 06511 USA

[39] UNIV GENOA, I-16146 GENOA, ITALY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.79.590

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The lifetimes of B+ and B-0 mesons are measured using a sample of 150000 hadronic Z(0) decays collected by the SLD experiment at the SLAG Linear Collider between 1993 and 1995. Two analyses are presented in which the decay length and charge of the 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(B+) = 1.66 +/- 0.06(stat) +/- 0.05(syst) ps, tau(B0) = 1.64 +/- 0.08(stat) +/- 0.08(syst) ps, and tau(B+)/tau(B0) = 1.01 +/- 0.07(stat) +/- 0.06(syst).

引用

页码：590 / 596

页数：7

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