Revisiting combinatorial ambiguities at Hadron Colliders with M T2

Higgs pair production is a crucial phenomenological process in deciphering the nature of the TeV scale and the mechanism underlying electroweak symmetry breaking. At the Large Hadron Collider, this process is statistically limited. Pushing the energy frontier beyond the LHC's reach will create new opportunities to exploit the rich phenomenology at higher centre-of-mass energies and luminosities. In this work, we perform a comparative analysis of the hh + jet channel at a future 100 TeV hadron collider. We focus on the hh → bbbb and hh → bbτ + τ − channels and employ a range of analysis techniques to estimate the sensitivity potential that can be gained by including this jet-associated Higgs pair production to the list of sensitive collider processes in such an environment. In particular, we observe that hh → bbτ + τ − in the boosted regime exhibits a large sensitivity to the Higgs boson self-coupling and the Higgs selfcoupling could be constrained at the 8% level in this channel alone.

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“…We must emphasise here that many distinctly different definitions of m T 2 have been considered in Ref. [58]. The authors in Ref.…”

Section: General Commentsmentioning

confidence: 99%

$$hh+\text {Jet}$$ h h + Jet production at 100 TeV

et al. 2018

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“…We choose the pairing which gives the smaller value of M T2 . This method can be justified by the fact that the M T2 value would be bounded from above by the parent particle mass m a 0 1 if the right pairing is chosen, whereas there is no such a restriction if the pairing was wrong [93]. Since we here consider a light pseudoscalar boson, an upper cut on the M T2 < 25 GeV is further implemented.…”

Section: Collider Analysismentioning

confidence: 99%

Probing the two light Higgs scenario in the NMSSM with a low-mass pseudoscalar

Cerdeño

Ghosh

Park

2013

J. High Energ. Phys.

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In this article we propose a simultaneous collider search strategy for a pair of scalar bosons in the NMSSM through the decays of a very light pseudoscalar. The massive scalar has a mass around 126 GeV while the lighter one can have a mass in the vicinity of 98 GeV (thus explaining an apparent LEP excess) or be much lighter. The successive decay of this scalar pair into two light pseudoscalars, followed by leptonic pseudoscalar decays, produces clean multi-lepton final states with small or no missing energy. Furthermore, this analysis offers an alternate leptonic probe for the 126 GeV scalar that can be comparable with the ZZ * search channel. We emphasize that a dedicated experimental search for multi-lepton final states can be an useful probe for this scenario and, in general, for the NMSSM Higgs sector. We illustrate our analysis with two representative benchmark points and show how the LHC configuration with 8 TeV center-of-mass energy and 25 fb −1 of integrated luminosity can start testing this scenario, providing a good determination of the light pseudoscalar mass and a relatively good estimation of the lightest scalar mass. *

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“…Even the assumption of one particular underlying symmetry allows some fixed number of different topologies from which the correct one can be identified comparing suitable kinematic variables [13]. One expects that the ignorance of the correct topology can add difficulties in solving combinatorial ambiguity [14][15][16][17] which is one source of complexity in mass determination methods, more prominently available when associated with long decay chain. This ambiguity can be originated from two different sources.…”

Section: Jhep03(2015)142mentioning

confidence: 99%

Constrained S ^ min $$ \sqrt{{\widehat{S}}_{\min }} $$ and reconstructing with semi-invisible production at hadron colliders

Swain

Konar

2015

J. High Energ. Phys.

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Mass variable Ŝ min and its variants [1,2] were constructed by minimising the parton level center of mass energy that is consistent with all inclusive measurements. They were proposed to have the ability to measure mass scale of new physics in a fully model independent way. In this work we relax the criteria by assuming the availability of partial informations of new physics events and thus constraining this mass variable even further. Starting with two different classes of production topology, i.e. antler and non-antler, we demonstrate the usefulness of these variables to constrain the unknown masses. This discussion is illustrated with different examples, from the standard model Higgs production and beyond standard model resonance productions leading to semi-invisible production. We also utilise these constrains to reconstruct the semi-invisible events with the momenta of invisible particles and thus improving the measurements to reveal the properties of new physics.

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Revisiting combinatorial ambiguities at Hadron Colliders with M T2

Cited by 42 publications

References 48 publications

$$hh+\text {Jet}$$ h h + Jet production at 100 TeV

$$hh+\text {Jet}$$ h h + Jet production at 100 TeV

Probing the two light Higgs scenario in the NMSSM with a low-mass pseudoscalar

Constrained S ^ min $$ \sqrt{{\widehat{S}}_{\min }} $$ and reconstructing with semi-invisible production at hadron colliders

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