Collider Tests of (Composite) Diphoton Resonances

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Resumé

We analyze the Large Hadron Collider sensitivity to new pseudoscalar resonances decaying into diphoton with masses up to scales of few TeVs. We focus on minimal scenarios where the production mechanisms involve either photon or top-mediated gluon fusion, partially motivated by the tantalizing excess around 750 GeV reported by ATLAS and CMS. The two scenarios lead respectively to a narrow and a wide resonance. We first provide a model-independent analysis via effective operators and then introduce minimal models of composite dynamics where the diphoton channel is characterized by their topological sector. The relevant state here is the pseudoscalar associated with the axial anomaly of the new composite dynamics. If the Standard Model top mass is generated via four-fermion operators the coupling of this state to the top remarkably explains the wide-width resonance reported by ATLAS. Beyond the excess, our analysis paves the way to test dynamical electroweak symmetry breaking via topological sectors.
OriginalsprogEngelsk
TidsskriftNuclear Physics, Section B
Vol/bind911
Sider (fra-til)106-126
ISSN0550-3213
DOI
StatusUdgivet - okt. 2016

Fingeraftryk

composite materials
sectors
operators
broken symmetry
fusion
fermions
anomalies
sensitivity
photons

Bibliografisk note

17 pages, 5 figures

Citer dette

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title = "Collider Tests of (Composite) Diphoton Resonances",
abstract = "We analyze the Large Hadron Collider sensitivity to new pseudoscalar resonances decaying into diphoton with masses up to scales of few TeVs. We focus on minimal scenarios where the production mechanisms involve either photon or top-mediated gluon fusion, partially motivated by the tantalizing excess around 750 GeV reported by ATLAS and CMS. The two scenarios lead respectively to a narrow and a wide resonance. We first provide a model-independent analysis via effective operators and then introduce minimal models of composite dynamics where the diphoton channel is characterized by their topological sector. The relevant state here is the pseudoscalar associated with the axial anomaly of the new composite dynamics. If the Standard Model top mass is generated via four-fermion operators the coupling of this state to the top remarkably explains the wide-width resonance reported by ATLAS. Beyond the excess, our analysis paves the way to test dynamical electroweak symmetry breaking via topological sectors.",
keywords = "hep-ph, hep-ex, hep-lat",
author = "Emiliano Molinaro and Francesco Sannino and Natascia Vignaroli",
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Collider Tests of (Composite) Diphoton Resonances. / Molinaro, Emiliano; Sannino, Francesco; Vignaroli, Natascia.

I: Nuclear Physics, Section B, Bind 911, 10.2016, s. 106-126.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Collider Tests of (Composite) Diphoton Resonances

AU - Molinaro, Emiliano

AU - Sannino, Francesco

AU - Vignaroli, Natascia

N1 - 17 pages, 5 figures

PY - 2016/10

Y1 - 2016/10

N2 - We analyze the Large Hadron Collider sensitivity to new pseudoscalar resonances decaying into diphoton with masses up to scales of few TeVs. We focus on minimal scenarios where the production mechanisms involve either photon or top-mediated gluon fusion, partially motivated by the tantalizing excess around 750 GeV reported by ATLAS and CMS. The two scenarios lead respectively to a narrow and a wide resonance. We first provide a model-independent analysis via effective operators and then introduce minimal models of composite dynamics where the diphoton channel is characterized by their topological sector. The relevant state here is the pseudoscalar associated with the axial anomaly of the new composite dynamics. If the Standard Model top mass is generated via four-fermion operators the coupling of this state to the top remarkably explains the wide-width resonance reported by ATLAS. Beyond the excess, our analysis paves the way to test dynamical electroweak symmetry breaking via topological sectors.

AB - We analyze the Large Hadron Collider sensitivity to new pseudoscalar resonances decaying into diphoton with masses up to scales of few TeVs. We focus on minimal scenarios where the production mechanisms involve either photon or top-mediated gluon fusion, partially motivated by the tantalizing excess around 750 GeV reported by ATLAS and CMS. The two scenarios lead respectively to a narrow and a wide resonance. We first provide a model-independent analysis via effective operators and then introduce minimal models of composite dynamics where the diphoton channel is characterized by their topological sector. The relevant state here is the pseudoscalar associated with the axial anomaly of the new composite dynamics. If the Standard Model top mass is generated via four-fermion operators the coupling of this state to the top remarkably explains the wide-width resonance reported by ATLAS. Beyond the excess, our analysis paves the way to test dynamical electroweak symmetry breaking via topological sectors.

KW - hep-ph

KW - hep-ex

KW - hep-lat

U2 - 10.1016/j.nuclphysb.2016.07.032

DO - 10.1016/j.nuclphysb.2016.07.032

M3 - Journal article

VL - 911

SP - 106

EP - 126

JO - Nuclear Physics, Section B

JF - Nuclear Physics, Section B

SN - 0550-3213

ER -