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2D energy-momentum tensor distributions of nucleon in a large- $N_{c}$ quark model from ultrarelativistic to nonrelativistic limit

https://doi.org/10.1103/PhysRevD.106.014012

Lorcé, Cédric; Schweitzer, Peter; Tezgin, Kemal (July 2022, Physical Review D)

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Monopole and quadrupole contributions to the angular momentum density

https://doi.org/10.1016/j.physletb.2019.07.033

Schweitzer, Peter; Tezgin, Kemal (September 2019, Physics Letters B)

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Energy momentum tensor and the $D$ term in the bag model

https://doi.org/10.1103/PhysRevD.101.034013

Neubelt, Matt J.; Sampino, Andrew; Hudson, Jonathan; Tezgin, Kemal; Schweitzer, Peter (February 2020, Physical Review D)

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Energy-momentum tensor densities in the bag model

https://doi.org/10.22323/1.352.0210

Neubelt, M. J.; Sampino, A.; Hudson, J.; Tezgin, Kemal; Schweitzer, P. (July 2019, XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019))

The form factors of the energy-momentum tensor can be accessed via studies of generalized parton distributions in hard exclusive reactions. In this talk we present recent results on the energy-momentum tensor form factors and densities in the bag model formulated in the large-Nc limit. The simplicity and lucidity of this quark model allow us to investigate many general concepts which have recently attracted interest, including pressure, shear forces and angular momentum density inside the nucleon. The results from the bag model are theoretically consistent, and comply with all general requirements.
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Applications of the WW-type approximation to SIDIS

https://doi.org/10.22323/1.352.0211

Bastami, Saman; Avakian, Harut; Efremov, Anatoly Vasilievich; Kotzinian, Aram; Musch, Bernhard; Parsamyan, Bakur; Prokudin, Alexei; Schlegel, Marc; Schnell, Gunar; Schweitzer, Peter; et al (July 2019, 27th International Workshop on Deep Inelastic Scattering and Related Subjects (DIS 2019))

We explore the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed O(1/Q2) terms in the Wandzura-Wilczek-type (WW-type) approximation, which consists in systematically assuming that q¯gq-correlators are much smaller than q¯q-correlators. Under the applicability of WW-type approximations, certain relations among transverse momentum dependent parton distribution functions (TMDs) and fragmentation functions (FFs) occur which are used to approximate SIDIS cross-section in terms of a smaller subset of TMDs and FFs. We discuss the applicability of the WW-type approximations on the basis of available data.
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