SOFT PHOTON PRODUCTION IN 450-GEV/C P-BE COLLISIONS

被引：65

作者：

ANTOS, J

BEKER, H

BRONS, S

BUSSMANN, K

DAGAN, S

DREES, A

ERD, C

ESTEN, MJ

FABJAN, CW

GLASSEL, P

GOERLACH, U

HEDBERG, V

LISSAUER, D

MAZZONI, MA

MCCUBBIN, NA

NEUBERT, M

NEVSKI, P

OLSEN, L

PFEIFFER, A

RAY, A

SCHUKRAFT, J

SHAPIRA, D

SOLTANI, J

SPECHT, HJ

STUMER, I

THOMPSON, J

VEENHOF, RJ

WILLIS, WJ

WOODY, C

机构：

[1] BROOKHAVEN NATL LAB,UPTON,NY 11973

[2] UNIV HEIDELBERG,D-69120 HEIDELBERG,GERMANY

[3] MOSCOW PHYS & ENGN INST,MOSCOW 115409,RUSSIA

[4] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831

[5] UNIV PITTSBURGH,PITTSBURGH,PA 15260

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

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

[8] UNIV TEL AVIV,IL-9978 RAMAT AVIV,ISRAEL

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1993年 / 59卷 / 04期

关键词：

D O I：

10.1007/BF01562546

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：

We have measured the inclusive p(T) spectra of soft photons produced at central and backward rapidities in 450 GeV/c p-Be collisions down to 1 MeV/c in transverse momentum. In the region 1 < p(T) < 20 MeV/c an excess of photons over those expected from hadronic decays is observed. This excess is comparable, within systematic errors, with estimates of direct photons produced via hadronic bremsstrahlung. An upper limit is derived on the presence of additional sources of direct photons at small transverse momentum.

引用

页码：547 / 553

页数：7

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