# Model study of generalized parton distributions with helicity flip

## Abstract

Generalized parton distributions with helicity flip are studied in the quark sector, within a simple version of the MIT bag model, assuming an SU(6) wave function for the proton target. In the framework under scrutiny, it turns out that only the generalized transversity distribution, H{sub T}{sup q}, is nonvanishing. For this quantity, the forward limit is properly recovered and numerical results are found to underestimate recent lattice data for its first moment. Positivity bounds recently proposed are fulfilled by the obtained distribution. The relevance of the analysis for the planning of measurements of the quark generalized transversity is addressed.

- Authors:

- Dipartimento di Fisica, Universita degli Studi di Perugia, and INFN, Sezione di Perugia, via A. Pascoli, 06100 Perugia (Italy)

- Publication Date:

- OSTI Identifier:
- 20774473

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Physical Review. D, Particles Fields; Journal Volume: 72; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.72.117502; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BAG MODEL; DISTRIBUTION; GLUONS; HELICITY; PROTONS; QUARKS; SU-6 GROUPS; WAVE FUNCTIONS

### Citation Formats

```
Scopetta, Sergio.
```*Model study of generalized parton distributions with helicity flip*. United States: N. p., 2005.
Web. doi:10.1103/PhysRevD.72.117502.

```
Scopetta, Sergio.
```*Model study of generalized parton distributions with helicity flip*. United States. doi:10.1103/PhysRevD.72.117502.

```
Scopetta, Sergio. Thu .
"Model study of generalized parton distributions with helicity flip". United States.
doi:10.1103/PhysRevD.72.117502.
```

```
@article{osti_20774473,
```

title = {Model study of generalized parton distributions with helicity flip},

author = {Scopetta, Sergio},

abstractNote = {Generalized parton distributions with helicity flip are studied in the quark sector, within a simple version of the MIT bag model, assuming an SU(6) wave function for the proton target. In the framework under scrutiny, it turns out that only the generalized transversity distribution, H{sub T}{sup q}, is nonvanishing. For this quantity, the forward limit is properly recovered and numerical results are found to underestimate recent lattice data for its first moment. Positivity bounds recently proposed are fulfilled by the obtained distribution. The relevance of the analysis for the planning of measurements of the quark generalized transversity is addressed.},

doi = {10.1103/PhysRevD.72.117502},

journal = {Physical Review. D, Particles Fields},

number = 11,

volume = 72,

place = {United States},

year = {Thu Dec 01 00:00:00 EST 2005},

month = {Thu Dec 01 00:00:00 EST 2005}

}

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