Measurement of 2- and 3- Nucleon Short Range Correlation Probabilities in Nuclei

Spokesperson

K. Sh.Egiyan

Year

2002

Abstract

The ratios of inclusive electron scattering cross sections of He, C12 and Fe56 to He3 have been measured at 1 < xB < 3 for the first time. At Q^2 > 1.4 GeV^2, the ratios exhibit two separate plateaus, at 1.5 < xB < 2 and 2.2 < xB. This pattern is predicted by scattering from 2- and 3- nucleon short-range correlations (SRC). Relative to A = 3, the per-nucleon probabilities of 3-nucleon SRC are 2.3, 3.2 and 4.6 times larger for A = 4, 12 and 56. This is the first measurement of 3-nucleon SRC probabilities in nuclei.

Comment

Using the measured onsets of 2- and 3-nucleon SRC, combined with the well known wave functions of deuterium and 3He, the absolute probabilities of these correlations were extracted, too.

Publications

1. K.S. Egiyan, N.B. Dashyan, M.M. Sargsian and CLAS collaboration Measurement of 2- and 3- Nucleon Short Range Correlation Probabilities in Nuclei // CLAS-NOTE 2005-004
2. K.S. Egiyan, N.B. Dashyan, M.M. Sargsian and CLAS collaboration Measurement of 2- and 3- Nucleon Short Range Correlation Probabilities in Nuclei // nucl-ex/0508026

Quantities

R(⁴He/³He)   R(¹²C/³He)   R(⁵⁶Fe/³He)

Measurements