Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-11-09
Phys.Rev. C59 (1999) 1526-1533
Physics
Nuclear Physics
Nuclear Theory
12 pages, 10 figures
Scientific paper
10.1103/PhysRevC.59.1526
The tensor analyzing power of the process $d + p \to d + X$, for forward deuteron scattering in the momentum interval 3.7 to 9 GeV/c, is studied in the framework of $\omega$ exchange in an algebraic collective model for the electroexcitation of nucleon resonances. We point out a special sensitivity of the tensor analyzing power to the isoscalar longitudinal form factor of the Roper resonance excitation. The main argument is that the $S_{11}(1535)$, $D_{13}(1520)$ and $S_{11}(1650)$ resonances have only isovector longitudinal form factors. It is the longitudinal form factor of the Roper excitation, which plays an important role in the $t-$dependence of the tensor analyzing power. We discuss possible evidence of swelling of hadrons with increasing excitation energy.
Bijker Roelof
Iachello Francesco
Leviatan Amiram
Rekalo Michail P.
Tomasi-Gustafsson Egle
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