NLO predictions for the production of a spin-two particle at the LHC
We obtain predictions accurate at the next-to-leading order in QCD for the production of a generic spin-two particle in the most relevant channels at the LHC: production in association with coloured particles (inclusive, one jet, two jets and $$t\bar t$$), with vector bosons ($$Z,W^\pm,\gamma$$) and with the Higgs boson. Here, we present total and differential cross sections as well as branching ratios as a function of the mass and the collision energy also considering the case of non-universal couplings to standard model particles. We find that the next-to-leading order corrections give rise to sizeable $K$ factors for many channels, in some cases exposing the unitarity-violating behaviour of non-universal couplings scenarios, and in general greatly reduce the theoretical uncertainties. Our predictions are publicly available in the MadGraph5_aMC@NLO framework and can, therefore, be directly used in experimental simulations of spin-two particle production for arbitrary values of the mass and couplings.
- Authors:
-
[1]
; [2]
; [3]
; [4]
; [5]
- Saha Inst. of Nuclear Physics, Kolkata (India). Theory Division
- Durham Univ. (United Kingdom). Inst. for Particle Physics Phenomenology, Dept. of Physics
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Univ. Catholique de Louvain (Belgium). Centre for Cosmology, Particle Physics and Phenomenology (CP3)
- European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theoretical Physics Dept.
- Publication Date:
- Grant/Contract Number:
- 291377; PITN-GA-2012-315877; PBELP2 146525; AC02-76SF00515
- Type:
- Accepted Manuscript
- Journal Name:
- Physics Letters. Section B
- Additional Journal Information:
- Journal Volume: 770; Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Research Org:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org:
- USDOE
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; LHC; Spin-two; QCD
- OSTI Identifier:
- 1373119
- Free Publicly Accessible Full Text
-
Accepted Manuscript (DOE)
- Publisher's Version of Record
- https://doi.org/10.1016/j.physletb.2017.05.007