MEASUREMENT OF SINGLE SPIN ASYMMETRY FOR DIRECT PHOTON PRODUCTION IN PP COLLISIONS AT 200-GEV C/

Authors
ADAMS DL AKCHURIN N BELIKOV NI BRAVAR A BYSTRICKY J CORCORAN MD COSSAIRT JD CRANSHAW J DEREVSCHIKOV AA ENYO H FUNAHASHI H GOTO Y GRACHOV OA GROSNICK DP HILL DA IIJIMA T IMAI K ITOW Y IWATANI K KRUEGER KW KURODA K LEHAR F DELESQUEN A LOPIANO D LUEHRING FC MAKI T MAKINO S MASAIKE A MATULENKO YA MESCHANIN AP MICHALOWICZ A MILLER DH MIYAKE K NAGAMINE T NESSITEDALDI F NESSI M NGUYEN C NURUSHEV SB OHASHI Y ONEL Y PATALAKHA DI PAULETTA G PENZO A READ AL ROBERTS JB VANROSSUM L RYKOV VL SAITO N SALVATO G SCHIAVON P SHIMA T SKEENS J SOLOVYANOV VL SPINKA H TAKASHIMA R TAKEUTCHI F TAMURA N TANAKA N UNDERWOOD DG VASILIEV AN VILLARI A WHITE JL YAMASHITA S YOKOSAWA A YOSHIDA T ZANETTI A
Citation
Dl. Adams et al., MEASUREMENT OF SINGLE SPIN ASYMMETRY FOR DIRECT PHOTON PRODUCTION IN PP COLLISIONS AT 200-GEV C/, Physics letters. Section B, 345(4), 1995, pp. 569-575
Citations number
27
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
345
Issue
4
Year of publication
1995
Pages
569 - 575
Database
ISI
SICI code
0370-2693(1995)345:4<569:MOSSAF>2.0.ZU;2-E
Abstract
The single spin asymmetry for inclusive direct-photon production has b een measured using a polarized proton beam of 200 GeV/c with an unpola rized proton target at -0.15 < x(F) < 0.15 and 2.5 < p(T) < 3.1 GeV/(c ) at Fermilab. The data on the cross section for pp --> gamma X at 2.5 < p(T) < 3.8 GeV/c are also provided. The measurement was done using lead-glass calorimeters and photon detectors which surrounded the fidu cial area of the calorimeters. Background rejection has been done usin g these surrounding photon detectors. The cross section obtained is co nsistent with the results of previous measurements assuming a nuclear dependence of A(1.0). The single spin asymmetry, A(N), for the direct- photon production is consistent with zero within experimental uncertai nty.