Prof.
Hyun Min Lee
(Chung-Ang University)
08/01/2016, 10:00
We discuss the potential interpretation of the diphoton excess at the LHC with a new resonance in effective field theory and present a concrete example with Kaluza-Klein graviton as the diphoton resonance, playing a role of the mediator of dark matter. We also show how the spin information of the resonance can be extracted from the kinetic distribution of the decay products.
Prof.
Hyung Do Kim
(Seoul National University)
08/01/2016, 10:30
Any new particle charged under SU(3)C and carrying electric charge will leave an imprint in the di-photon invariant mass spectrum as it can mediate gg to gamma gamma process through loops. The combination of properties of loop functions and gluon pdfs results in a peak-like feature in the di-photon invariant mass around twice the mass of a given particle. Using recent ATLAS analysis, we set...
Prof.
Kwang Sik Jeong
(Pusan National University)
08/01/2016, 11:00
We argue that the QCD axion can arise from many aligned axions with decay constants much smaller than the conventional axion window. If the typical decay constant is of O(100) GeV to 1 TeV, one or more of the axions or saxions may account for the recently found diphoton excess at ∼750 GeV. Our scenario predicts many axions and saxions coupled to gluons with decay constants of order the weak...
Dr
Kenji Nishiwaki
(KIAS)
08/01/2016, 13:30
We investigate a possibility for explaining the recently announced 750 GeV diphoton excess by the ATLAS and the CMS experiments at the CERN LHC in a model with multiple doubly-charged particles, which was originally suggested for explaining tiny neutrino masses through a three-loop effect in a natural way. The enhanced radiatively generated effective coupling of a new singlet scalar S with...
Prof.
Jong-Chul Park
(Chungnam National University)
08/01/2016, 14:00
Motivated by the recently reported diphoton resonance at 750 GeV, we study a new axion-like bosonic portal model of dark matter physics. When the resonance particle is identified as the pseudo-scalar mediator, via which the standard model sector would interact with the dark matter sector, the data from collider physics would provide profound implications to dark matter phenomenology. In this...
Dr
Won Sang Cho
(IBS CTPU)
08/01/2016, 14:30
We discuss non-standard interpretations of the 750 GeV diphoton excess recently reported by the
ATLAS and CMS Collaborations which do not involve a new, relatively broad, resonance with a
mass near 750 GeV. Instead, we consider the sequential cascade decay of a much heavier, possibly
quite narrow, resonance into two photons along with one or more invisible particles. The resulting
diphoton...
Dr
Kunio Kaneta
(IBS CTPU)
08/01/2016, 15:00
We discuss a possible connection between the 750 GeV diphoton excess and a heavy neutral gauge boson (Z') in view of the idea of the grand unified theory. The unification of the gauge coupling constants is a guiding principle in our scenario. There, the gauged B-L symmetry is naturally introduced. We point out a simple fact that a new scalar boson of 750 GeV would imply a TeV-scale Z' which...
Prof.
Pyungwon Ko
(KIAS)
08/01/2016, 16:00
I describe possible BSM scenarios which can accommodate the 750 GeV diphoton excess in a generic way.
Dr
Yeo Woong Yoon
(Konkuk University)
08/01/2016, 16:30
We discuss that the interference between 750 diphoton resonance and continuum background has two considerable effects: (1) enhancing or suppressing diphoton signal rate due to the imaginary-part interference and (2) distorting resonance shape due to the real-part interference. We find that the resonance contribution to the 750 GeV excess can be enhanced by a factor of 2(1.6) for 3(6) fb signal...
