n-p short range correlations from (p,2p + n) measurements
Jun, 20024 pages
Published in:
- Phys.Rev.Lett. 90 (2003) 042301
e-Print:
- nucl-ex/0206003 [nucl-ex]
Report number:
- KSU-CNR-202-07
Citations per year
Abstract:
We studied the C(p,2p+n) reaction at beam momenta of 5.9, 8.0 and 9.0 GeV/c. For quasielastic (p,2p) events we reconstructed {\bf p_f} the momentum of the knocked-out proton before the reaction: {\bf p_f} was then compared (event-by-event) with {\bf p_n}, the measured, coincident neutron momentum. For > k = 0.220 GeV/c (the Fermi momentum) a strong back-to-back directional correlation between {\bf p_f} and {\bf p_n} was observed, indicative of short-range n-p correlations. From {\bf p_n} and {\bf p_f} we constructed the distributions of c.m. and relative motion in the longitudinal direction for correlated pairs. After correcting for detection efficiency, flux attenuation and solid angle, we determined that 49 13 % of events with > k_F had directionally correlated neutrons with > k. Thus short-range 2N correlations are a major source of high-momentum nucleons in nuclei.- p nucleus: nuclear reaction
- carbon
- nucleon: multiple production
- angular correlation
- p n: correlation function
- correlation: short-range
- magnetic spectrometer: experimental results
- Brookhaven PS
- p carbon --> n 2p anything
- 5.9: 8.0: 9.0 GeV/c
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