QCD studies with e(+)e(-) annihilation data at 161 GeV

被引：115

作者：

Ackerstaff, K

Alexander, G

Allison, J

Altekamp, N

Ametewee, K

Anderson, KJ

Anderson, S

Arcelli, S

Asai, S

Axen, D

Azuelos, G

Ball, AN

Bell, KW

Bella, G

Bentvelsen, S

Berlich, P

Bethke, S

Biebel, O

Biguzzi, A

Bird, SD

Blobel, V

Bloodworth, IJ

Bloomer, JE

Bobinski, M

Bock, P

Bonacorsi, D

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

Cooke, OC

Cuffiani, M

Dado, S

Dallapiccola, C

Dallavalle, GM

DeJong, S

机构：

[1] UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND

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

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

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

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

[6] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

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

[8] CARLETON UNIV,CTR RES PARTICLE PHYS,OTTAWA,ON K1S 5B6,CANADA

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

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

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

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

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

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

[15] RHEIN WESTFAL TH AACHEN,INST PHYS 2,D-52056 AACHEN,GERMANY

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

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

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

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

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

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

[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,PARTICLE PHYS DEPT,IL-76100 REHOVOT,ISRAEL

[29] UNIV HAMBURG,DESY,INST EXPT PHYS 2,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 / 75卷 / 02期

基金：

加拿大自然科学与工程研究理事会; 以色列科学基金会; 美国国家科学基金会;

关键词：

D O I：

10.1007/s002880050462

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：

Wt have studied hadronic events produced at LEP at a centre-of-mass energy of 161 GeV, We present distributions of event shape variables, jet rates, charged particle momentum spectra and multiplicities. We determine the: strong coupling strength to be alpha(s)(161 GeV) = 0.101+/-0.005(stat.)+/- 0.007(syst.). the mean charged particle multiplicity to be [n(ch)](161 GeV) = 24.16+/-0.45(stat.)+/-0.44(syst,) and the position of the peak in the xi(p) = In(1/x(p)) distribution to be xi(0)(161 GeV) = 4.00+/-0.03(stat.)+/-0.04(syst.). These results are compared to data taken at lower centre-of-mass energies and to analytic QCD or Monte Carlo predictions, Our measured value of alpha(8)(161 GeV) is consistent with other measurements of alpha(8). Within the current statistical and systematic uncertainties, the PYTHIA, HERWIG and ARIADNE QCD Monte Carlo models and analytic calculations are in overall agreement with our measurements, The COJETS QCD Monte Carlo is in general agreement with the data for momentum weighted distributions like Thrust, but predicts a significantly larger charged particle multiplicity than is. observed experimentally.

引用

页码：193 / 207

页数：15

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