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Perturbative supersymmetric gauge coupling unification is possible in six theories where complete SU(5) TeV-scale multiplets of vector matter account for the size of the reported $750~{\rm GeV}$ diphoton resonance, interpreted as a singlet…

High Energy Physics - Phenomenology · Physics 2016-08-24 Lawrence J. Hall , Keisuke Harigaya , Yasunori Nomura

A very plausible explanation for the recently observed diphoton excess at the 13 TeV LHC is a (pseudo)scalar with mass around 750 GeV, which couples to a gluon pair and to a photon pair through loops involving vector-like quarks (VLQs). To…

High Energy Physics - Phenomenology · Physics 2016-04-13 Jiayin Gu , Zhen Liu

The ATLAS and CMS experiments at the LHC have found significant excess in the diphoton invariant mass distribution near 750 GeV. We interpret this excess in a predictive nonsupersymmetric SU(5) grand unified framework with a singlet scalar…

High Energy Physics - Phenomenology · Physics 2016-04-12 Ketan M. Patel , Pankaj Sharma

The ATLAS and CMS collaborations recently presented evidence of a resonance decaying to pairs of photons around 750 GeV. In addition, the BaBar, Belle, and LHCb collaborations have evidence of lepton non-universality in the semileptonic…

High Energy Physics - Phenomenology · Physics 2016-04-12 Christopher W. Murphy

We consider the possibility that the diphoton excess at 750 GeV is caused by a new scalar resonance produced in photon fusion. This scenario is parametrised by only one relevant effective couplings and is thus minimal. We show that this…

High Energy Physics - Phenomenology · Physics 2016-04-27 Sylvain Fichet , Gero von Gersdorff , Christophe Royon

We suggest that the recently observed diphoton excess at 750 GeV comes from a quasi-degenerate bunch of gauge singlet scalars produced and decaying through one or more vector-like fermions. This explains the broad nature of the resonance,…

High Energy Physics - Phenomenology · Physics 2016-03-09 Indrani Chakraborty , Anirban Kundu

The 750-760 GeV diphoton resonance may be identified as one or two scalars and/or one or two pseudoscalars contained in the two singlet superfields S_{1,2} arising from the three 27-dimensional representations of E_6 . The three 27s also…

High Energy Physics - Phenomenology · Physics 2016-04-20 S. F. King , R. Nevzorov

We investigate the 750 GeV diphoton excess in terms of supersymmetric models which preserve grand unification in the ultraviolet. We show that minimal extensions of the MSSM by a singlet and a vector-like 5-plet or 10-plet of SU(5) can…

High Energy Physics - Phenomenology · Physics 2016-06-29 Hans Peter Nilles , Martin Wolfgang Winkler

We study a supersymmetric extension of the vector-like lepton scenario, such that the vacuum instability induced by large lepton Yukawa couplings is lifted by the presence of superpartners at or below the TeV scale. In order to preserve the…

High Energy Physics - Phenomenology · Physics 2013-07-23 Aniket Joglekar , Pedro Schwaller , Carlos E. M. Wagner

Recently the ATLAS and CMS collaborations at the LHC announced their observation of a potential 750 GeV di-photon resonance, after analyzing the $\sqrt{s}=13$ TeV LHC data. This observation has significant implications for low-energy…

High Energy Physics - Phenomenology · Physics 2016-06-29 Yun Jiang , Ying-Ying Li , Tao Liu

We interpret the 750~GeV diphoton excess recently found in the 13~TeV LHC data as a singlet scalar in an extra dimensional model, where one extra dimension is introduced. In the model, the scalar couples to multiple vector-like fermions,…

High Energy Physics - Phenomenology · Physics 2016-04-28 Chengfeng Cai , Zhao-Huan Yu , Hong-Hao Zhang

In this paper, we study the recent 750 GeV diphoton excess in the Hill Model with vector-like fermions, in which the singlet-like Higgs boson is chosen as 750 GeV resonance and is mainly produced by the gluon fusion through vector-like top…

High Energy Physics - Phenomenology · Physics 2016-09-21 Ning Liu , Wenyu Wang , Mengchao Zhang , Rui Zheng

We study the diphoton excesses near $750$ GeV recently reported by the ATLAS and CMS collaborations within the context of a phenomenologically interesting intersecting/magnetized D-brane model on a toroidal orientifold. It is shown that the…

High Energy Physics - Phenomenology · Physics 2016-07-13 Tianjun Li , James A. Maxin , Van E. Mayes , Dimitri V. Nanopoulos

We propose a simple model accommodating the reported 750 GeV diphoton excess seen in the first 13-TeV run of the LHC. It leads to testable predictions, in particular for di-lepton production, at higher integrated luminosity. We append to…

High Energy Physics - Phenomenology · Physics 2016-09-01 Thomas Appelquist , James Ingoldby , Maurizio Piai , Jedidiah Thompson

Recently, the ATLAS and CMS collaborations report excesses around $750$ GeV in the diphoton channels. This might be the evidence which reveals new physics beyond the Standard Model. In this paper, we consider models with a $750$ GeV scalar…

High Energy Physics - Phenomenology · Physics 2016-06-15 Junichiro Kawamura , Yuji Omura

We study models with heavy exotics that account for the LHC $750$ GeV diphoton excess in light of current vector-like quark bounds. Utilizing only exotics that may appear in three-stack and four-stack D-brane models, we show that a narrow…

High Energy Physics - Phenomenology · Physics 2016-02-22 Mirjam Cvetic , James Halverson , Paul Langacker

The observed excess in the diphoton mass spectrum around 750 GeV at the 13 TeV LHC possibly indicates the presence of a photonphilic resonance. We show that the excess can be explained by a scalar of the type involved in Bekenstein's…

High Energy Physics - Phenomenology · Physics 2016-05-19 Tanumoy Mandal , Ulf Danielsson , Rikard Enberg , Gunnar Ingelman

We interpret the 750-760 GeV diphoton resonance as one or more of the spinless components of a singlet superfield arising from the three 27-dimensional representations of $E_6$ in F-theory, which also contain three copies of colour-triplet…

High Energy Physics - Phenomenology · Physics 2016-05-04 Athanasios Karozas , Stephen F. King , George K. Leontaris , Andrew K. Meadowcroft

We discuss a possible interpretation of the $750$ GeV diphoton resonance, recently reported at the LHC, within a class of $SU(2)_L\times SU(2)_R\times SU(4)$ models with gauge coupling unification. The unification is imposed by the…

High Energy Physics - Phenomenology · Physics 2016-06-21 Ufuk Aydemir , Djordje Minic , Chen Sun , Tatsu Takeuchi

We consider the 750 GeV diphoton resonance at the 13 TeV LHC in the ${\cal F}$-$SU(5)$ model with a Standard Model (SM) singlet field which couples to TeV-scale vector-like particles, dubbed $flippons$. This singlet field assumes the role…

High Energy Physics - Phenomenology · Physics 2016-07-06 Tianjun Li , James A. Maxin , Van E. Mayes , Dimitri V. Nanopoulos
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