Separation of theH2(e,e’p) structure functions up to 0.9 GeV/cmomentum transfer

Abstract

Longitudinal, transverse, and longitudinal-transverse structure functions for the H(e, e'p) reaction have been determined. Measurements of the cross sections were made in-plane in nearly quasielastic kinematics spanning momentum transfers between 200 and 670 MeV/c and recoil moments between 0 and 150 MeV/c. In addition, cross sections at momentum transfers above 800MeV/c were measured at backward scattering angles in aligned kinematics where the response is predominantly transverse. We compared our data with both relativistic and nonrelativistic models.Our results are not consistently in agreement with any of the calculations based on these models. The disagreement between our data and these calculations ranges froxn 0% to 30%%uo, on average it is about 10'%%uo. Notable discrepancies arise in describing relativistic effects for the longitudinaltransverse structure function, at a momentum transfer of 400 MeV/c as well as for the transverse structure function at momentuxn transfer above 800 MeV/c. PACS number(s): 21.45.+v, 25.10.+s, 25.30.Fj

The longitudinal response function of the deuteron in chiral effective field theory

“…The kinematics and data for f L are listed in Table I. The experiments of van der Schaar et al [42] and Ducret et al [43] give their data as ratios between the measured longitudinal response and that predicted by a Paris-potential [70] impulse-approximation calculation. For those two experiments we have calculated f…”

“…[42][43][44] are presented in terms of the lab. frame value of |q| and the value of the "missing momentum",…”

Few-nucleon systems at MAMI and beyond

“…R L and R T have been determined at NIKHEF [17,18], Saclay [14], and at MITBates [15]. Figure 5 shows a comparison of the various results for overlapping kinematics.…”

“…The major results of these experiments will be presented below. In general, all published re- [14] and Bates [15] to the calculation by H. Arenhövel [19], [20]. Right: Response functions from NIKHEF [17,18] and Bates [15].…”

“…Ratio of experiment to theory for low missing momenta. Data points: blue diamonds [11], red squares [14], violet circles [12], turquoise triangles down [9], green triangles left [15], orange triangles up [16].…”