Measurement of the B- and (B)over-bar(0) meson lifetimes using semileptonic decays

被引：17

作者：

Abe, F

Akimoto, H

Akopian, A

Albrow, MG

Amendolia, SR

Amidei, D

Antos, J

AnwayWiese, C

Aota, S

Apollinari, G

Asakawa, T

Ashmanskas, W

Atac, M

Azfar, F

AzziBacchetta, P

Bacchetta, N

Badgett, W

Bagdasarov, S

Bailey, MW

Bao, J

deBarbaro, P

BarbaroGaltieri, A

Barnes, VE

Barnett, BA

Barzi, E

Bauer, G

Baumann, T

Bedeschi, F

Behrends, S

Belforte, S

Bellettini, G

Bellinger, J

Benjamin, D

Benlloch, J

Bensinger, J

Benton, D

Beretvas, A

Berge, JP

Berryhill, J

Bertolucci, S

Bhatti, A

Biery, K

Brinkley, M

Bisello, D

Blair, RE

Blocker, C

Bodek, A

Bokhari, W

Bolognesi, V

Bortoletto, D

机构：

[1] ARGONNE NATL LAB,ARGONNE,IL 60439

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

[3] BRANDEIS UNIV,WALTHAM,MA 02254

[4] UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024

[5] UNIV CHICAGO,CHICAGO,IL 60637

[6] DUKE UNIV,DURHAM,NC 27708

[7] FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510

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

[9] HARVARD UNIV,CAMBRIDGE,MA 02138

[10] HIROSHIMA UNIV,HIGASHIHIROSHIMA 724,JAPAN

[11] UNIV ILLINOIS,URBANA,IL 61801

[12] MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA

[13] UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA

[14] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218

[15] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[16] MIT,CAMBRIDGE,MA 02139

[17] UNIV MICHIGAN,ANN ARBOR,MI 48109

[18] MICHIGAN STATE UNIV,E LANSING,MI 48824

[19] UNIV NEW MEXICO,ALBUQUERQUE,NM 87131

[20] OSAKA CITY UNIV,OSAKA 588,JAPAN

[21] UNIV PADUA,IST NAZL FIS NUCL,SEZ PADOVA,I-35131 PADUA,ITALY

[22] UNIV PENN,PHILADELPHIA,PA 19104

[23] UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY

[24] SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY

[25] UNIV PITTSBURGH,PITTSBURGH,PA 15260

[26] PURDUE UNIV,W LAFAYETTE,IN 47907

[27] UNIV ROCHESTER,ROCHESTER,NY 14627

[28] ROCKEFELLER UNIV,NEW YORK,NY 10021

[29] RUTGERS STATE UNIV,PISCATAWAY,NJ 08854

[30] ACAD SINICA,TAIPEI 11529,TAIWAN

[31] TEXAS A&M UNIV,COLLEGE STN,TX 77843

[32] TEXAS TECH UNIV,LUBBOCK,TX 79409

[33] UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN

[34] TUFTS UNIV,MEDFORD,MA 02155

[35] UNIV WISCONSIN,MADISON,WI 53706

[36] YALE UNIV,NEW HAVEN,CT 06511

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.76.4462

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The lifetimes of the B- and (B) over bar(0) mesons are measured using the partially reconstructed semileptonic decays (B) over bar --> Dl(-)<(nu)over bar>X, where D is either a D-0 or D*(+) meson. The data were collected by the CDF detector at the Fermilab Tevatron collider during 1992-1993 and correspond to 19.3 pb(-1) of <(p)over bar p> collisions at root s = 1.8 TeV. We measure the decay length distributions and find the lifetimes to be tau(B-)= 1.56 +/- 0.13 +/- 0.06 ps and tau(($) over bar(0)) = 1.54 +/- 0.08 +/- 0.06 ps, and the ratio of lifetimes to be tau(B-)/tau((B) over bar(0)) = 1.01 +/- 0.11 +/- 0.02, where the first uncertainties are statistical and the second are systematic.

引用

页码：4462 / 4467

页数：6

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