Short Range Correlations and the EMC Effect

Measurement of the EMC effect in the deuteron

“…In order to separate the overall normalization uncertainty from other systematic uncertainties, we fit the EMC slope in the range 0.35 < x < 0.7 and rescaled the data such that the linear fit intersected unity at x = 0.31. This value was obtained from a global analysis of the EMC effect in all nuclei [13]. The scaling factors ranged from 0.99 to 1.01 for the different cases.…”

“…The slopes |dR A EMC /dx| for 0.35 < x < 0.7 increase with A, however, the 9 Be slope is anomalously large, suggesting perhaps that the EMC effect is dependent on local density and that 9 Be might be acting like two tightly bound α particles and a neutron. A recent analysis [13] suggests that dR A EMC /dx is proportional to the probability of finding short-range correlations in nuclei [14][15][16][17][18][19]. Recent work on this subject [20][21][22][23][24][25] concludes that although binding and Fermi motion effects contribute, some modification of the bound nucleon's structure appears to be required to explain the EMC effect.…”

Hard QCD Processes in the Nuclear Medium

“…There is increasing evidence that the EMC effect can be related to multinucleon short range correlations (SRCs) [7]. It is possible to obtain x > 1, since the parton that was struck could have been shared between nucleons.…”

“…There appears to be a direct linear correlation between these quantities, and Weinstein et al [7] have used this to make predictions for a 2 (A) for several nuclei. This correlation does lend credence to the expectation that short range correlations are highly modified by the nuclear medium.…”

“…Recently, Weinstein et al [7] noted a correlation between the strength of the EMC effect (as characterized by the slope of the EMC ratio in the region 0.35 < x < 0.7) and the strength of two-nucleon SRCs (as characterized by a 2 (A)). There appears to be a direct linear correlation between these quantities, and Weinstein et al [7] have used this to make predictions for a 2 (A) for several nuclei.…”