Center-edge asymmetry at hadron colliders

Arkani-Hamed, Dimopoulos and Dvali (ADD) proposed a model in which gravity propagates freely in d extra, compact spatial dimensions. The prospects of discovery and identification of large extra spatial dimensions effects in the process of lepton and photon pair production at the Large Hadron Collider (LHC) were studied. These effects can be found by the specific behavior of the invariant mass distributions of the lepton and photon pairs. Identification of the effects under study in lepton and photon pairs production can be performed with center-egde asymmetry. Discovery and identification reach on the mass scale parameter M S can be obtained for graviton Kaluza -Klein towers in lepton and photon pair production processes at the LHC.

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“…In the real data analysis, asymmetry is always adopted. In [7,8,9] center-edge asymmetry has been proposed at LHC for such kind of analysis.…”

Section: Discovery and Identification Reach On M S In The Dilepton Chmentioning

confidence: 99%

Searching for and identifying large extra dimensions in dilepton and diphoton final states at the Large Hadron Collider

Serenkova¹,

Tsytrinov²,

Pankov³

2015

Proceedings of XXII International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXII)

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“…An observable potentially avoiding this ambiguity, and which we adopt to perform the angular analysis, is the z-evenly integrated center-edge angular asymmetry [9,10]:…”

Section: Basic Observables and Angular Analysismentioning

confidence: 99%

Signals of Warped Extra Dimensions at the LHC

Osland¹,

Панков²,

Tsytrinov³

et al. 2010

AIP Conference Proceedings

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Abstract. We discuss the signatures of the spin-2 graviton excitations predicted by the RandallSundrum model with one warped extra dimension, in dilepton and diphoton production at LHC. By using a specific angular analysis, we assess the ranges in mass and coupling constant where such gravitons can be discriminated against competitor spin-1 and spin-0 objects, that potentially could manifest themselves in these processes with the same mass and rate of events. Depending on the value of the coupling constant to quarks and leptons, the numerical results indicate graviton identification mass ranges up to 1.1-2.4 TeV and 1.6-3.2 TeV for LHC nominal energy of 14 TeV and time-integrated luminosity of 10 and 100 fb −1 , respectively.

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“…The center-edge asymmetry was first proposed in [30][31][32] for spin identification of Kaluza-Klein gravitons at the LHC. The approach based on A CE was further developed in subsequent papers [33][34][35][36] for spin identification of heavy resonances in dilepton and diphoton channels at the LHC.…”

Section: Introductionmentioning

confidence: 99%

The Higgs-like boson spin from the center–edge asymmetry in the diphoton channel at the LHC

Osland

Панков²,

Tsytrinov³

2015

Eur. Phys. J. C

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We discuss the discrimination of the 125 GeV spin-parity 0 + Higgs-like boson observed at the LHC, decaying into two photons, H → γ γ , against the hypothesis of a minimally coupled J P = 2 + narrow diphoton resonance with the same mass and giving the same total number of signal events under the peak. We apply, as the basic observable of the analysis, the center-edge asymmetry A CE of the cosine of the polar angle of the produced photons in the diphoton rest frame to distinguish between the tested spin hypotheses. We show that the center-edge asymmetry A CE should provide a strong discrimination between the possibilities of spin-0 and spin-2 with graviton-like couplings, depending on the fraction of qq production of the spin-2 signal, reaching CL s < 10 −6 for f qq = 0. Indeed, the A CE has the potential to do better than existing analyses for f qq < 0.4.

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Center-edge asymmetry at hadron colliders

Cited by 29 publications

References 57 publications

Searching for and identifying large extra dimensions in dilepton and diphoton final states at the Large Hadron Collider

Searching for and identifying large extra dimensions in dilepton and diphoton final states at the Large Hadron Collider

Signals of Warped Extra Dimensions at the LHC

The Higgs-like boson spin from the center–edge asymmetry in the diphoton channel at the LHC

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