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Scrutinizing a di-photon resonance at the LHC through Moscow zero
High Energy Physics - Phenomenology · Submitted 16 Aug 2016
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We look in detail the consequences of their results deriving strong constraints on models where a scalar resonance $s$ decays into two light pseudoscalars which in turn decay into two pairs of collimated photons, mis-identified with two real photons.
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The abstract, sentence by sentence
The ATLAS and CMS collaborations have recently released their new analyses of the diphoton searches. We look in detail the consequences of their results deriving strong constraints on models where a scalar resonance $s$ decays into two light pseudoscalars which in turn decay into two pairs of collimated photons, mis-identified with two real photons. In our construction, all mass terms are generated dynamically, and only one pair of vector-like fermions generate couplings which will be probed using the upcoming LHC data. Moreover, we show that a stable dark matter candidate, respecting the cosmological constraints, is naturally affordable in the model.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The ATLAS and CMS collaborations have recently released their new analyses of the diphoton searches. | background 1.00 | 0.04 | 0.02 | asserted 0.99 |
| s1 | We look in detail the consequences of their results deriving strong constraints on models where a scalar resonance $s$ decays into two light pseudoscalars which in turn decay into two pairs of collimated photons, mis-identified with two real photons. | contribution 0.76 | 0.90 | 0.49 | asserted 1.00 |
| s2 | In our construction, all mass terms are generated dynamically, and only one pair of vector-like fermions generate couplings which will be probed using the upcoming LHC data. | method 0.75 | 0.77 | 0.09 | asserted 1.00 |
| s3 | Moreover, we show that a stable dark matter candidate, respecting the cosmological constraints, is naturally affordable in the model. | result 0.82 | 0.86 | 0.15 | asserted 0.98 |
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The paper
Original abstract
The ATLAS and CMS collaborations have recently released their new analyses of the diphoton searches. We look in detail the consequences of their results deriving strong constraints on models where a scalar resonance $s$ decays into two light pseudoscalars which in turn decay into two pairs of collimated photons, mis-identified with two real photons. In our construction, all mass terms are generated dynamically, and only one pair of vector-like fermions generate couplings which will be probed using the upcoming LHC data. Moreover, we show that a stable dark matter candidate, respecting the cosmological constraints, is naturally affordable in the model.
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References
How the literature uses it
1 arXiv paper cite this in 1 sentence
What it cites · 51 sentences without a confident label
Builds on 1 paper
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[ref] so that, similar to the DM interactions, the couplings among the field $Φ$ and the SM gauge bosons are also dynamically generated.
Re-opening dark matter windows compatible with a diphoton excess · Introduction · 1.00
Uses the method or tool of 1 paper
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[ref] by inspecting the ratio $|β_λ/λ|$.
Indirect Constraints on the Scalar Di-Photon Resonance at the LHC · The ultra-violet regime · 0.96
Uses data or values from 2 papers
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For a dark matter candidate $χ$ heavier than the pseudoscalar $a$, the correct relic density $Ωh^2 ≃0.12$ [ref] can be achieved through a classical freeze out with a thermally averaged pair annihilation cross-section $⟨σv ⟩∼3 ×10^-26 ^3 ^-1$.
Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results · Introducing a dark sector · 0.95
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For a dark matter candidate $χ$ heavier than the pseudoscalar $a$, the correct relic density $Ωh^2 ≃0.12$ [ref] can be achieved through a classical freeze out with a thermally averaged pair annihilation cross-section $⟨σv ⟩∼3 ×10^-26 ^3 ^-1$.
Planck 2013 results. XVI. Cosmological parameters · Introducing a dark sector · 0.95
Compares with 1 paper
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[ref] with the effective field theory approach.
Re-opening dark matter windows compatible with a diphoton excess · Introducing a dark sector · 0.92
Cites as support 13 papers
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[ref] , that the presence of DM does not influence the prediction of 4-photon production cross-section since, when kinematically allowed, invisible decay processes like $s →χχ$ or even $a →χχ$ would feature a suppressed branching fraction.
Re-opening dark matter windows compatible with a diphoton excess · Introducing a dark sector · 0.96
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[ref] , in order to achieve a production cross-section of the order of the current experimental sensitivity, possibly accompanied by a sizable decay width, one should require either (1) large and possibly non-perturbative, i.e., $> √(4π)$, Yukawa couplings between the new BSM fermions and the 750 GeV resonance or (2) large number of new fermions or (3) large hypercharge assignment for these BSM fermions, unless rather particular setups are realized [ref] .
Di-Photon excess in the 2HDM: hasting towards the instability and the non-perturbative regime · Introduction · 0.98
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[ref] , in order to achieve a production cross-section of the order of the current experimental sensitivity, possibly accompanied by a sizable decay width, one should require either (1) large and possibly non-perturbative, i.e., $> √(4π)$, Yukawa couplings between the new BSM fermions and the 750 GeV resonance or (2) large number of new fermions or (3) large hypercharge assignment for these BSM fermions, unless rather particular setups are realized [ref] .
On the maximal diphoton width · Introduction · 0.98
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