OBSERVATION OF A NARROW STRUCTURE IN THE PP ELASTIC-SCATTERING OBSERVABLE A(OONN) AT T-KIN=2.11GEV

被引：21

作者：

BALL, J

CHAMOUARD, PA

COMBET, M

FONTAINE, JM

KUNNE, R

LAGNIEL, JM

LEMAIRE, JL

MILLERET, G

SANS, JL

BYSTRICKY, J

LEHAR, F

DELESQUEN, A

DEMALI, M

DEMIERRE, P

HESS, R

JANOUT, ZF

LOMON, EL

RAPIN, D

VUARIDEL, B

BARABASH, LS

JANOUT, Z

KALINNIKOV, VA

KAZARINOV, YM

KHACHATUROV, BA

MATAFONOV, VN

PISAREV, IL

POPOV, AA

USOV, YA

BEDDO, M

GROSNICK, D

KASPRZYK, T

LOPIANO, D

SPINKA, H

BOUTEFNOUCHET, A

GHAZIKHANIAN, V

WHITTEN, CA

机构：

[1] CE SACLAY, CEA, DSM, F-91191 GIF SUR YVETTE, FRANCE

[2] CE SACLAY, DAPNIA, F-91191 GIF SUR YVETTE, FRANCE

[3] UNIV GENEVA, DPNC, CH-1211 GENEVA 4, SWITZERLAND

[4] JINR, LNP, 101000 MOSCOW, RUSSIA

[5] ANL, HEP, ARGONNE, IL 60439 USA

[6] UNIV CALIF LOS ANGELES, LOS ANGELES, CA 90024 USA

来源：

PHYSICS LETTERS B | 1994年 / 320卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(94)90847-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The angular dependence of the pp elastic scattering spin correlation parameter was measured in the angular range from 60 degrees to 97 degrees CM at 14 energies between 1.96 and 2.23 GeV. A rapid decrease of the energy dependence of this observable at 90 degrees CM is observed around 2.11 GeV kinetic energy. This agrees with the behavior of A(oonn) predicted on the basis of an exotic six-quark structure. The A(oonn) (90 degrees CM), together with the known differential cross section, allows the determination of the absolute value of the pure spin-singlet amplitude. The energy dependence of this amplitude shows a shoulder centered at 2.11 GeV, corresponding to a total mass of 2.735 GeV and an estimated width of 17 MeV.

引用

页码：206 / 210

页数：5

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