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arXiv 0810.4958hep-ph
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Gamma N Delta形状因子和Wigner旋转

Gamma N Delta Form Factors and Wigner Rotations

Milton Dean Slaughter

摘要:

50多年来,人们对Delta N gamma形状因子进行了实验、理论和现象学研究。虽然在了解它们的行为方面取得了实质性进展,但仍有许多工作要做。在许多调查中使用的一个主要工具是三个Delta N gamma形状因子的Jones-Scadron Delta静止帧参数化。我们指出,许多研究利用这种参数化可能不占维格纳旋转和随之而来的螺旋度混合,englance时,三角洲是不是在休息。

英文摘要:

For more than 50 years the Delta N gamma form factors have been studied experimentally, theoretically, and phenomenologically. Although there has been substantial progress in understanding their behavior, there remains much work to be done. A major tool used in many investigations is the Jones-Scadron Delta rest frame parametrization of the three Delta N gamma form factors. We point out that many studies utilizing this parametrization may not account for Wigner rotations and the consequent helicity mixing that ensues when the Delta is not at rest.

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