B* production in Z(0) decays

被引：30

作者：

Ackerstaff, K

Alexander, G

Allison, J

Altekamp, N

Ametewee, K

Anderson, JK

Anderson, S

Arcelli, S

Asai, S

Axen, D

Azuelos, G

Ball, AH

Barberio, E

Barlow, RJ

Bartoldus, R

Batley, JR

Bechtluft, J

Beeston, C

Behnke, T

Bell, AN

Bell, KW

Bella, G

Bentvelsen, S

Berlich, P

Bethke, S

Biebel, O

Biguzzi, A

Blobel, V

Bloodworth, IJ

Bloomer, JE

Bobinski, M

Bock, P

Bosch, HM

Boutemeur, M

Bouwens, BT

Braibant, S

Brown, RM

Burckhart, HJ

Burgard, C

Burgin, R

Capiluppi, P

Carnegie, RK

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Chrisman, D

Clarke, PEL

Cohen, I

Conboy, JE

机构：

[1] UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY

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

[3] UNIV BONN,INST PHYS,D-53115 BONN,GERMANY

[4] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

[5] CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

[6] CARLETON UNIV,DEPT PHYS,OTTAWA CARLETON INST PHYS,OTTAWA,ON K1S 5B6,CANADA

[7] CERN,EUROPEAN ORG PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND

[8] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

[9] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637

[10] UNIV FREIBURG,FAK PHYS,D-79104 FREIBURG,GERMANY

[11] UNIV HEIDELBERG,INST PHYS,D-69120 HEIDELBERG,GERMANY

[12] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

[13] UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND

[14] RHEIN WESTFAL TH AACHEN,INST PHYS 3,D-52056 AACHEN,GERMANY

[15] UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND

[16] UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND

[17] UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742

[18] UNIV MONTREAL,PHYS NUCL LAB,MONTREAL,PQ H3C 3J7,CANADA

[19] UNIV OREGON,DEPT PHYS,EUGENE,OR 97403

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

[21] CE SACLAY,CEA,DAPNIA,SPP,F-91191 GIF SUR YVETTE,FRANCE

[22] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL

[23] TEL AVIV UNIV,DEPT PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL

[24] UNIV TOKYO,INT CTR ELEMENTARY PARTICLE PHYS,TOKYO 113,JAPAN

[25] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN

[26] KOBE UNIV,KOBE,HYOGO 657,JAPAN

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

[28] WEIZMANN INST SCI,DEPT PARTICLE PHYS,IL-76100 REHOVOT,ISRAEL

[29] UNIV HAMBURG,INST EXPT PHYS 2,DESY,D-22607 HAMBURG,GERMANY

[30] UNIV VICTORIA,DEPT PHYS,VICTORIA,BC V8W 3P6,CANADA

[31] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER,BC V6T 1Z1,CANADA

[32] UNIV ALBERTA,DEPT PHYS,EDMONTON,AB T6G 2J1,CANADA

[33] DUKE UNIV,DEPT PHYS,DURHAM,NC 27708

[34] RES INST PARTICLE & NUCL PHYS,H-1525 BUDAPEST,HUNGARY

[35] INST NUCL RES,H-4001 DEBRECEN,HUNGARY

[36] UNIV MUNICH,SEKT PHYS,D-85748 GARCHING,GERMANY

[37] TRIUMF,VANCOUVER,BC V6T 2A3,CANADA

[38] LAJOS KOSSUTH UNIV,DEPT EXPT PHYS,DEBRECEN,HUNGARY

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1997年 / 74卷 / 03期

关键词：

D O I：

10.1007/s002880050404

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The process B* --> B gamma has been observed in a sample of approximately 4.1 million hadronic Z(0) decays collected by the OPAL detector at LEP in the years 1991-1995. Inclusively reconstructed B mesons have been combined with converted photons to reconstruct approximately 1900 B* mesons. The B*-B mass difference is found to be Delta M(B* - B) = 46.2 +/- 0.3 +/- 0.8 MeV/c(2), and the rate of B* meson production relative to that of B mesons is found to be sigma(B*)/sigma(B) = 0.760 +/- 0.036 +/- 0.083, where the first errors are statistical and the second systematic. The angular distribution of the transition photon in the B* rest frame has been measured and the relative contribution of longitudinal B* polarization states found to be sigma(l)/(sigma(l) + sigma(t)) = 0.36 +/- 0.06 +/- 0.07, consistent with a simple spin counting picture. These results average over B-0, B+/- and B-s(0) mesons.

引用

页码：413 / 422

页数：10

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