OBSERVATION OF RAPIDITY GAPS IN (P)OVER-BAR-P COLLISIONS AT 1.8 TEV

被引：92

作者：

ABE, F

ALBROW, M

AMIDEI, D

ANWAYWIESE, C

APOLLINARI, G

ATAC, M

AUCHINCLOSS, P

AZZI, P

BACCHETTA, N

BADEN, AR

BADGETT, W

BAILEY, MW

BAMBERGER, A

DEBARBARO, P

BARBAROGALTIERI, A

BARNES, VE

BARNETT, BA

BARTALINI, P

BAUER, G

BAUMANN, T

BEDESCHI, F

BEHRENDS, S

BELFORTE, S

BELLETTINI, G

BELLINGER, J

BENJAMIN, D

BENLLOCH, J

BENSINGER, J

BERETVAS, A

BERGE, JP

BERTOLUCCI, S

BIERY, K

BHADRA, S

BINKLEY, M

BISELLO, D

BLAIR, R

BLOCKER, C

BODEK, A

BOLOGNESI, V

BOOTH, AW

BOSWELL, C

BRANDENBURG, G

BROWN, D

BUCKLEYGEER, E

BUDD, HS

BUSETTO, G

BYONWAGNER, A

BYRUM, KL

CAMPAGNARI, C

CAMPBELL, M

机构：

[1] ARGONNE NATL LAB,ARGONNE,IL 60439

[2] BRANDEIS UNIV,WALTHAM,MA 02254

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

[4] UNIV CHICAGO,CHICAGO,IL 60637

[5] DUKE UNIV,DURHAM,NC 27706

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

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

[8] HARVARD UNIV,CAMBRIDGE,MA 02138

[9] MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ,CANADA

[10] UNIV TORONTO,TORONTO,ON,CANADA

[11] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218

[12] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[13] MIT,CAMBRIDGE,MA 02139

[14] UNIV MICHIGAN,ANN ARBOR,MI 48109

[15] UNIV NEW MEXICO,ALBUQUERQUE,NM 87131

[16] UNIV PADUA,INST NAZL FIS NUCL,I-35131 PADUA,ITALY

[17] UNIV PENN,PHILADELPHIA,PA 19104

[18] UNIV PITTSBURGH,PITTSBURGH,PA 15260

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

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

[21] PURDUE UNIV,W LAFAYETTE,IN 47907

[22] UNIV ROCHESTER,ROCHESTER,NY 14627

[23] ROCKEFELLER UNIV,NEW YORK,NY 10021

[24] RUTGERS STATE UNIV,PISCATAWAY,NJ 08854

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

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

[27] TUFTS UNIV,MEDFORD,MA 02155

[28] UNIV WISCONSIN,MADISON,WI 53706

[29] UNIV ILLINOIS,URBANA,IL 61801

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.74.855

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In pp̄ collisions at s=1.8 TeV we find jet events with a rapidity gap topology. The number of hadrons in the rapidity interval ΔηD between leading-jet cones was sampled by charged tracks with PT>400 MeV/c. We find excess trackless events beyond that expected in a smooth multiplicity distribution. In a control region outside ΔηD we see no excess. For ΔηD>0.8, the fraction of excess trackless events, consistent with estimates based on exchange of color-singlet digluons, is R(gap)=σjet(gap) σjet=0.0085±0.0012(stat)-0.0012+0.0024(syst). © 1995 The American Physical Society.

引用

页码：855 / 859

页数：5

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