Eur. Phys. J. C (2016) 76: 667
https://doi.org/10.1140/epjc/s10052-016-4478-x

Regular Article - Theoretical Physics

The two-loop QCD correction to massive spin-2 resonance

¹ The Institute of Mathematical Sciences, IV Cross Road, CIT Campus, Chennai, 600 113, India
² Theory Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata, 700 064, India
³ Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400 085, India

^* e-mail: goutam.das@saha.ac.in

Received: 8 September 2016
Accepted: 31 October 2016
Published online: 3 December 2016

Abstract

The two-loop QCD correction to massive spin-2 graviton decaying to is presented considering a generic universal spin-2 coupling to the SM through the conserved energy-momentum tensor. Such a massive spin-2 particle can arise in extra-dimensional models. The ultraviolet and infrared structure of the QCD amplitudes are studied. In dimensional regularization, the infrared pole structure is in agreement with Catani’s proposal, confirming the universal factorization property of QCD amplitudes, even with the spin-2 tensorial coupling.