On a possible interpretation of the spin-dependent structure function g2(x) in the parton model

Ter-Isaakyan, N.L.

doi:10.1016/0370-2693(94)01276-8

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“…4Px ;q ? ): (9) In this frame the structure functions g 1 (x) and g 2 (x) are expressed through antisymmetric components of the hadronic tensor W a i0 (i = 1; 2) as follows: q 2 ? 4 Px W a i0 ( 0 ; ) = 2i ij q j fg 1 (x) 0 + 2Mx q 2 ?…”

Section: Kinematics Impulse Approximationmentioning

confidence: 99%

“…The following circumstance should be noted. The equation ( 13) is not an exact equation even in the special IMF (9). It could be violated for spin-ip amplitudes, and should be understood only under de nite prescriptions.…”

Section: Kinematics Impulse Approximationmentioning

confidence: 99%

“…The procedure involves convolution of the nucleon in nite momentum frame (IMF) (or light cone) distributions in nucleus with parton distributions in the nucleon 4,5]. On the other hand, the structure function g 2 (x) has no simple interpretation in probabilistic language 7,8,9] and it is natural to expect that the procedure of extracting g n 2 (x) from nuclear data should be more complicated. The nuclear e ects for spin dependent structure functions were investigated in a number of papers (see, e.g.…”

Section: Introductionmentioning

confidence: 99%

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The deuteron spin dependent structure function g2(x) in a relativistic model

Ter-Isaakyan¹

1996

Physics Letters B

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The spin dependent deuteron structure functions are investigated in the relativistic model of deuteron. It is shown that the deuteron structure function g 2 (X) can be considered properly only in the in nite momentum frame where the virtual photon has pure transverse components (q 0 = q 3 ! 0 at P ! 1), whereas in the conventional Breit frame the impulse approximation for g 2 (X) may be violated due to q q pair creation by the virtual photon. It is shown that due to relativistic e ects the deuteron structure function g 2 (X) has a nontrivial contribution determined by rst derivative of the nucleon structure function g 1 (x).Such contribution is small but it increases when X ! 1. It may achieve about 10 % at X 0:75 and could be essentially larger for the transverse structure function g ? (X):

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Section: Kinematics Impulse Approximationmentioning

confidence: 99%

Section: Kinematics Impulse Approximationmentioning

confidence: 99%