dorsal/arxiv
View SchemaRelativistic effects and angular dependence in the reaction antiproton-proton -> pi^- pi^+
| Authors | B. El-Bennich, W. M. Kloet |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0403071 |
| URL | https://arxiv.org/abs/nucl-th/0403071 |
| DOI | 10.1103/PhysRevC.70.034002 |
| Journal | Phys.Rev. C70 (2004) 034002 |
Abstract
We present a new fit to the LEAR data on antiproton-proton -> pi^- pi^+ differential cross sections and analyzing powers motivated by relativistic considerations. Within a quark model describing this annihilation we argue, since the pions are highly energetic, that relativistic effects cannot be neglected. The intrinsic pion wave functions are Lorentz transformed to the center of mass frame. This change in quark geometry gives rise to additional angular dependence in the transition operators and results in a relative enhancement of higher J \ge 2 partial wave amplitudes. The fit to the data is improved significantly.
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"abstract": "We present a new fit to the LEAR data on antiproton-proton -\u003e pi^- pi^+\ndifferential cross sections and analyzing powers motivated by relativistic\nconsiderations. Within a quark model describing this annihilation we argue,\nsince the pions are highly energetic, that relativistic effects cannot be\nneglected. The intrinsic pion wave functions are Lorentz transformed to the\ncenter of mass frame. This change in quark geometry gives rise to additional\nangular dependence in the transition operators and results in a relative\nenhancement of higher J \\ge 2 partial wave amplitudes. The fit to the data is\nimproved significantly.",
"arxiv_id": "nucl-th/0403071",
"authors": [
"B. El-Bennich",
"W. M. Kloet"
],
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"nucl-th"
],
"doi": "10.1103/PhysRevC.70.034002",
"journal_ref": "Phys.Rev. C70 (2004) 034002",
"title": "Relativistic effects and angular dependence in the reaction antiproton-proton -\u003e pi^- pi^+",
"url": "https://arxiv.org/abs/nucl-th/0403071"
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