Precision measurements of antiproton-proton forward elastic scattering parameters in the 3.7 to 6.2 GeV/c region

被引：17

作者：

Armstrong, TA

Bettoni, D

Bharadwaj, V

Biino, C

Blanford, G

Borreani, G

Broemmelsiek, D

Buzzo, A

Calabrese, R

Ceccucci, A

Cester, R

Church, M

Dalpiaz, P

Dalpiaz, PF

Dibenedetto, R

Dimitroyannis, D

Fabbri, M

Fast, J

Gianoli, A

Ginsburg, CM

Gollwitzer, K

Govi, G

Hahn, A

Hasan, MA

Hsueh, S

Lewis, R

Luppi, E

Macri, M

Majewska, AM

Mandelkern, M

Marchetto, F

Marinelli, M

Marques, J

Marsh, W

Martini, M

Masuzawa, M

Menichetti, E

Migliori, A

Mussa, R

Palestini, S

Pallavicini, M

Passagio, S

Pastrone, N

Patrignani, C

Pedlar, TK

Peoples, J

Pesando, L

Petrucci, F

Pia, MG

Pordes, S

机构：

[1] FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA

[2] UNIV FERRARA, I-44100 FERRARA, ITALY

[3] IST NAZL FIS NUCL, I-44100 FERRARA, ITALY

[4] IST NAZL FIS NUCL, I-16146 GENOA, ITALY

[5] UNIV GENOA, I-16146 GENOA, ITALY

[6] UNIV CALIF IRVINE, IRVINE, CA 92717 USA

[7] NORTHWESTERN UNIV, EVANSTON, IL 60208 USA

[8] UNIV TURIN, I-10125 TURIN, ITALY

[9] IST NAZL FIS NUCL, I-10125 TURIN, ITALY

来源：

PHYSICS LETTERS B | 1996年 / 385卷 / 1-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(96)01026-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Differential cross sections for <(p)over bar p> elastic scattering have been measured for very small momentum transfers at six different incident antiproton momenta in the range 3.7 to 6.2 GeV/c by the detection of recoil protons at scattering angles close to 90 degrees. Forward scattering parameters sigma(T), b, and rho have been determined. For the rho-parameter, up to an order of magnitude higher level of precision has been achieved compared to that in earlier experiments. It is found that existing dispersion theory predictions are in disagreement with our results for the rho-parameter.

引用

页码：479 / 486

页数：8

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