Measurement of double parton scattering in (p)over-bar-p collisions at root s=1.8 TeV

被引：120

作者：

Abe, F

Akimoto, H

Akopian, A

Albrow, MG

Amendolia, SR

Amidei, D

Antos, J

Aota, S

Apollinari, G

Asakawa, T

Ashmanskas, W

Atac, M

Azfar, F

AzziBacchetta, P

Badgett, W

Bagdasarov, S

Bailey, MW

Bao, J

deBarbaro, P

BarbaroGaltieri, A

Barnes, VE

Barnett, BA

Barone, M

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

Bevensee, B

Bhatti, A

Biery, K

Binkley, M

Bisello, D

Blair, RE

Blocker, C

Bodek, A

Bokhari, W

Bolognesi, V

Bolla, G

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 02264

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

[5] UNIV CHICAGO,CHICAGO,IL 60638

[6] DUKE UNIV,DURHAM,NC 28708

[7] UNIV FLORIDA,GAINESVILLE,FL 33611

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

[9] UNIV GENEVA,CH-1211 GENEVA 4,SWITZERLAND

[10] HARVARD UNIV,CAMBRIDGE,MA 02138

[11] HIROSHIMA UNIV,HIGASHIHIROSHIMA 724,JAPAN

[12] UNIV ILLINOIS,URBANA,IL 61801

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

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

[15] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218

[16] UNIV KARLSRUHE,D-76128 KARLSRUHE,GERMANY

[17] MIT,CAMBRIDGE,MA 02139

[18] UNIV MICHIGAN,ANN ARBOR,MI 48109

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

[20] UNIV NEW MEXICO,ALBUQUERQUE,NM 87132

[21] OHIO STATE UNIV,COLUMBUS,OH 43320

[22] OSAKA CITY UNIV,OSAKA 588,JAPAN

[23] UNIV PADUA,IST NAZL FIS NUCL,SEZ PADOVA,I-36132 PADUA,ITALY

[24] UNIV PENN,PHILADELPHIA,PA 19104

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

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

[27] UNIV PITTSBURGH,PITTSBURG,PA 15270

[28] PURDUE UNIV,W LAFAYETTE,IN 47907

[29] UNIV ROCHESTER,ROCHESTER,NY 14628

[30] ROCKEFELLER UNIV,NEW YORK,NY 10021

[31] RUTGERS STATE UNIV,PISCATAWAY,NJ 08854

[32] ACAD SINICA,TAIPEI 11530,TAIWAN

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

[34] TEXAS TECH UNIV,LUBBOCK,TX 79409

[35] UNIV TSUKUBA,TSUKUBA,IBARAKI 315,JAPAN

[36] TUFTS UNIV,MEDFORD,MA 02155

[37] UNIV WISCONSIN,MADISON,WI 53806

[38] YALE UNIV,NEW HAVEN,CT 06511

[39] ERNEST ORLANDO LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720

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

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.79.584

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A strong signal for double parton scattering (DP) is observed in a 16 pb(-1) sample of (p) over bar p(-1) sample of (p) over bar p --> gamma + 3 jets + X data from the CDF experiment at the Fermilab Tevatron. The process-independent DP parameter, sigma(eff), is obtained without reference to theoretical calculations by comparing observed DP events to events with hard scatterings at separate (p) over bar p collisions. The result, sigma(eff) = (14.5 +/- 1.7(-2.3)(+1.7)) mb. represents a significant improvement over previous measurements. For the first time, the Feynman x dependence of the sigma(eff) parameter is investigated, and no dependence is seen.

引用

页码：584 / 589

页数：6

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