MEASUREMENT OF THE CROSS-SECTION FOR PRODUCTION OF 2 ISOLATED PROMPT PHOTONS IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEV

被引：33

作者：

ABE, F

ALBROW, M

AMIDEI, D

ANWAYWIESE, C

APOLLINARI, G

ATAC, M

AUCHINCLOSS, P

AZZI, P

BADEN, AR

BACCHETTA, N

BADGETT, W

BAILEY, MW

BAMBERGER, A

DEBARBARO, P

BARBAROGALTIERI, A

BARNES, VE

BARNETT, BA

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

CANER, A

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] DUKE UNIV,DURHAM,NC 27706

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

[6] IST NAZL FIS NUCL,LAB NAZL FRASCATI,FRASCATI,ITALY

[7] HARVARD UNIV,CAMBRIDGE,MA 02138

[8] UNIV ILLINOIS,URBANA,IL 61801

[9] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218

[10] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[11] MIT,CAMBRIDGE,MA 02139

[12] UNIV MICHIGAN,ANN ARBOR,MI 48109

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

[14] UNIV PENN,PHILADELPHIA,PA 19104

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

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

[17] PURDUE UNIV,W LAFAYETTE,IN 47907

[18] UNIV ROCHESTER,ROCHESTER,NY 14627

[19] ROCKEFELLER UNIV,NEW YORK,NY 10021

[20] RUTGERS STATE UNIV,PISCATAWAY,NJ 08854

[21] TEXAS A&M UNIV SYST,COLL STN,TX 77843

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

[23] TUFTS UNIV,MEDFORD,MA 02155

[24] UNIV WISCONSIN,MADISON,WI 53706

[25] UNIV CHICAGO,CHICAGO,IL 60637

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.70.2232

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements from events with two isolated prompt photons in ppBAR collisions at square-root s=1.8 TeV. The differential cross section, measured as a function of transverse momentum (P(T)) of each photon, is about 3 times what next-to-leading-order QCD calculations predict. The cross section for photons with P(T) in the range 10-19 GeV is 86 +/- 27(stat)-23(+32)(syst) pb. We also study the correlation between the two photons in both azimuthal angle and P(T). The magnitude of the vector sum of the transverse momenta of both photons, K(T)=\P(T1) + P(T2)\, has a mean value of [K(T)]=5.1 +/- 1.1 GeV.

引用

页码：2232 / 2236

页数：5

共 11 条

[1] MEASUREMENT OF THE ISOLATED PROMPT PHOTON CROSS-SECTION IN (P)BAR-P COLLISIONS AT ROOT-S = 1.8 TEV
ABE, F
AMIDEI, D
APOLLINARI, G
ATAC, M
AUCHINCLOSS, P
BADEN, AR
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BAILEY, MW
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DEBARBARO, P
BARNETT, BA
BARBAROGALTIERI, A
BARNES, VE
BAUMANN, T
BEDESCHI, F
BEHRENDS, S
BELFORTE, S
BELLETTINI, G
BELLINGER, J
BENJAMIN, D
BENSINGER, J
BERETVAS, A
BERGE, JP
BERTOLUCCI, S
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
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