Massive spin-2 scattering amplitudes in extra-dimensional theories

Massive spin-2 scattering amplitudes in extra-dimensional theories
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超维理论中的巨大自旋2散射振幅

DOI:
10.1103/physrevd.101.075013
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发表时间:
2020
期刊:
影响因子:
5
通讯作者:
Simmons, Elizabeth H.
Simmons, Elizabeth H.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chivukula, R. Sekhar;Foren, Dennis;Mohan, Kirtimaan A.;Sengupta, Dipan;Simmons, Elizabeth H.

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在本文中,我们详细地描述了具有单一紧致额外维度的引力理论中质量自旋2的Kaluza-Klein激发的散射振幅的计算,无论是平坦的还是翘曲的。这些散射幅度的特点是不同贡献之间错综复杂的抵消:尽管个人贡献可能增长得一样快,但整个结果只会增长。我们证明了所有进入和离开的粒子螺旋度都存在抵消,并研究了截断计算以仅包括有限数量的中间态如何影响结果的准确性。我们还仔细评估了低能有效Kaluza-Klein理论的有效范围。特别地,对于翘曲情形,我们直接演示了由ADS/CFT对应所推测的浮现低能标度如何控制散射幅度的大小。
In this paper we describe in detail the computation of the scattering amplitudes of massive spin-2 Kaluza-Klein excitations in a gravitational theory with a single compact extra dimension, whether flat or warped. These scattering amplitudes are characterized by intricate cancellations between different contributions: although individual contributions may grow as fast as, the full results grow only as. We demonstrate that the cancellations persist for all incoming and outgoing particle helicities and examine how truncating the computation to only include a finite number of intermediate states impacts the accuracy of the results. We also carefully assess the range of validity of the low-energy effective Kaluza-Klein theory. In particular, for the warped case we demonstrate directly how an emergent low-energy scale controls the size of the scattering amplitude, as conjectured by the AdS/CFT correspondence.
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发表时间: 2001
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