Interpreting the 750 GeV diphoton excess in minimal extensions of Two-Higgs-Doublet models - INSPIRE

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Interpreting the 750 GeV diphoton excess in minimal extensions of Two-Higgs-Doublet models

Marcin Badziak
(
- Warsaw U.
)

Dec 23, 2015

6 pages

Published in:

Phys.Lett.B 759 (2016) 464-470

Published: Aug 10, 2016

e-Print:

1512.07497 [hep-ph]

DOI:

10.1016/j.physletb.2016.06.003

View in:

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Abstract: (Elsevier)

It is shown that the 750 GeV diphoton excess can be explained in extensions of Two-Higgs-Doublet Models that do not involve large multiplicities of new electromagnetically charged states. The key observation is that at moderate and large tan⁡β the total decay width of the 750 GeV Higgs is strongly reduced as compared to the Standard Model. This allows for much more economical choices of new states that enhance the diphoton signal to fit the data. In particular, it is shown that one family of vector-like quarks and leptons with SM charges is enough to explain the 750 GeV diphoton excess. Moreover, such charge assignment can keep the 125 GeV Higgs signal rates exactly at the SM values. The scenario can interpret the diphoton excess provided that the total decay width of a hypothetical resonance that would be measured at the LHC turns out to not exceed few GeV.

Note:

11 pages, 4 figures; v2: fig.3, discussion of ditau constraints, comments and references added; to appear in PLB

Higgs particle: doublet: 2
model: minimal
two-photon
quark: vector particle
lepton: vector particle
family: 1
Higgs particle: decay
parameter space
numerical calculations
interpretation of experiments

References(64)

Figures(9)

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(
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(
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)
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,
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(
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(
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Alexandre Alves
(
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)
,
Alex G. Dias
(
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)
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Kuver Sinha
(
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Wei Chao
(
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(
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Keisuke Harigaya
(
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Matthew Low
(
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Andrea Tesi
(
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)
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Lian-Tao Wang
(
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•
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(
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)
,
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(
- Weizmann Inst. and
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,
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•
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