Regular Article - Theoretical Physics
Diphoton excess at 750 GeV: gluon–gluon fusion or quark–antiquark annihilation?
High Energy Physics Division, Argonne National Laboratory, Argonne, IL, 60439, USA
2 Department of Physics, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
3 Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
* e-mail: email@example.com
Accepted: 10 June 2016
Published online: 23 June 2016
Recently, ATLAS and CMS collaborations reported an excess in the measurement of diphoton events, which can be explained by a new resonance with a mass around 750 GeV. In this work, we explored the possibility of identifying if the hypothetical new resonance is produced through gluon–gluon fusion or quark–antiquark annihilation, or tagging the beam. Three different observables for beam tagging, namely the rapidity and transverse-momentum distribution of the diphoton, and one tagged bottom-jet cross section, are proposed. Combining the information gained from these observables, a clear distinction of the production mechanism for the diphoton resonance is promising.
© The Author(s), 2016