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arXiv 2511.09501hep-th
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天体梅林振幅II:自旋1与自旋2的交换及其他

Celestial Mellin Amplitudes II: Spin-1 and Spin-2 Exchange, and Beyond

Università degli Studi di Napoli Federico II(那不勒斯费德里科二世大学);INFN, Sezione di Napoli(意大利国家核物理研究所那不勒斯分部)

Sébastien Malherbe, Paolo Pergola, Charlotte Sleight, Massimo Taronna

AI总结:

该研究发展天体梅林振幅以描述带自旋粒子交换,推导自旋1、2交换的闭式振幅与OPE数据,通过梅林空间移位算子将结果推广到任意整数自旋,为带自旋场的关联函数研究提供方法。

摘要:

我们进一步发展了天体梅林振幅(arXiv:2412.11992),以描述带自旋粒子的交换。对于无质量外部标量场,我们推导了自旋1与自旋2(包括无质量和有质量)交换的闭式天体梅林振幅,并提取了直接道中相关的OPE数据。对于规范玻色子与引力子的交换,我们在天体OPE中识别出自旋1流、自旋2应力张量,以及边界规范玻色子和引力子。涉及带自旋场的微扰时序关联函数,可通过对外部点作用微分算子从标量场的关联函数得到;在梅林空间中,这些作用表现为梅林变量上的有限差(移位)算子,我们用它将结果推广到任意整数自旋。

英文摘要:

We further develop celestial Mellin amplitudes arXiv:2412.11992 to capture the exchange of particles with spin. For massless external scalar fields, we derive closed-form celestial Mellin amplitudes for a spin-1 and spin-2 exchange---both massless and massive---and extract the associated OPE data in the direct-channel. For gauge-boson and graviton exchanges, we identify in the celestial OPE the spin-1 current and the spin-2 stress tensor, together with the boundary gauge boson and graviton. Perturbative time-ordered correlators involving spinning fields can be obtained from those of scalars through the action of differential operators on the external points. In Mellin space these actions become finite-difference (shift) operators in the Mellin variables, which we use to extend our results to arbitrary integer spin.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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