SPIN TRANSFER IN INCLUSIVE LAMBDA(0)-PRODUCTION BY TRANSVERSELY POLARIZED PROTONS AT 200 GEV C/

Authors
BRAVAR A ADAMS DL AKCHURIN N BELIKOV NI BONNER BE 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 KURODA K LAGHAI M 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 RAPPAZZO GF READ AL ROBERTS JB VANROSSUM L RYKOV VL SAITO N SALVATO G SCHIAVON P SKEENS J SOLOVYANOV VL SPINKA H STANEK RW TAKASHIMA R TAKEUTCHI F TAMURA N UNDERWOOD DG VASILIEV AN WHITE JL YAMASHITA S YOKOSAWA A YOSHIDA T ZANETTI AM
Citation
A. Bravar et al., SPIN TRANSFER IN INCLUSIVE LAMBDA(0)-PRODUCTION BY TRANSVERSELY POLARIZED PROTONS AT 200 GEV C/, Physical review letters, 78(21), 1997, pp. 4003-4006
Citations number
28
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
78
Issue
21
Year of publication
1997
Pages
4003 - 4006
Database
ISI
SICI code
0031-9007(1997)78:21<4003:STIILB>2.0.ZU;2-8
Abstract
Surprisingly large polarizations in hyperon production by unpolarized protons have been known for a long time. The spin dynamics of the prod uction process can be further investigated with polarized beams. Recen tly, a negative asymmetry A(N) was found in inclusive Lambda(0) produc tion with a 200 GeV/c transversely polarized proton beam. The depolari zation D-NN in p up arrow + p --> Lambda(0) + X has been measured with the same beam over a wide x(F) range and at moderate p(tau). D-NN rea ches positive values of about 30% at high x(F) and p(T) similar to 1.0 Ge V/c. This result shows a sizable spin transfer from the incident p olarized proton to the outgoing Lambda(0).