Extracting MSSM masses from heavy Higgs boson decays to four leptons at the CERN LHC

Huang, Peisi; Kersting, N.; Yang, H.

doi:10.1103/physrevd.77.075011

Cited by 10 publications

(15 citation statements)

References 26 publications

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“…Let us now suppose we have a e + e − µ ± event of maximal M e + e − and minimal M l2l (a very similar analysis can be done for e + e − µ + µ − events from χ 0 i χ 0 j decays, but we will not need this for the present study 7 ). By the discussion of the last section the kinematic configuration must be of the type shown in Fig.…”

Section: Finding Masses From One Eventmentioning

confidence: 99%

“…i = j, due to a suppression of the Z 0 χ 0 i χ 0 i coupling [6,10]. Assuming again that the neutralinos decay through a 3-body decay as in (10), we now have an endstate described by four lepton momenta p 1,2,3,4 which can be analyzed via a set of seven invariant masses [7], including e.g.…”

Section: Neutralino-neutralino Modesmentioning

confidence: 99%

“…As for − → β 2 , there is no nice analytical expression, but we can nevertheless constrain 7 If the number of e + e − µ + µ − events is sufficiently high we can also get events where M e + e − and M µ + µ − are both maximal, also allowing for a straightforward mass-reconstruction [11].…”

Section: }mentioning

confidence: 99%

“…The endstate will therefore contain three leptons (of which at least two are oppositesign-same-flavor (OSSF)) whose momenta p 1,2,3 can, in the spirit of [7], be systematically contracted into three independent invariant masses 5 :…”

Section: Chargino-neutralino Modesmentioning

confidence: 99%

“…Each SUSY EW-ino event ( χ i ± χ j ∓ , χ i ± χ j 0 , or χ i 0 χ j 0 ) may thus contain multiple (as many as ten) hard leptons, the momenta of which, when contracted into all possible invariant masses (as in [7]), encode much information. This was previously overlooked in the literature, presumably because pairs of EW-inos arising from hadronic collisions carry an uncertain center-of-mass energy, hence yielding final state leptons not amenable to the usual invariant-mass endpoint analysis.…”

Section: Introductionmentioning

confidence: 99%

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On measuring Split-SUSY neutralino and chargino masses at the LHC

Kersting

2009

Eur. Phys. J. C

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In Split-Supersymmetry models, where the only non-Standard Model states produceable at LHC-energies consist of a gluino plus neutralinos and charginos, it is conventionally accepted that only mass differences among these latter are measureable at the LHC. The present work shows that application of a simple 'Kinematic Selection' technique allows full reconstruction of neutralino and chargino masses from one event, in principle. A Monte Carlo simulation demonstrates the feasibilty of using this technique at the LHC.

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Section: Finding Masses From One Eventmentioning

confidence: 99%

Section: Neutralino-neutralino Modesmentioning

confidence: 99%

Section: }mentioning

confidence: 99%

Section: Chargino-neutralino Modesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On measuring Split-SUSY neutralino and chargino masses at the LHC

Kersting

2009

Eur. Phys. J. C

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A review of the mass measurement techniques proposed for the Large Hadron Collider

Barr¹,

Lester²

2010

J. Phys. G: Nucl. Part. Phys.

125

182

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Four-lepton LHC events from MSSM Higgs boson decays into neutralino and chargino pairs

Bisset¹,

Li²,

Kersting³

et al. 2009

J. High Energy Phys.

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Heavy neutral Higgs boson production and decay into neutralino and chargino pairs is studied at the Large Hadron Collider in the context of the minimal supersymmetric standard model. Higgs boson decays into the heavier neutralino and chargino states, i.e., H 0 , A 0 → χ 0 2 χ 0 3 , χ 0 2 χ 0 4 , χ 0 3 χ 0 3 , χ 0 3 χ 0 4 , χ 0 4 χ 0 4 as well as H 0 , A 0 → χ ± 1 χ ∓ 2 , χ + 2 χ − 2 (all leading to four-lepton plus missing transverse energy final states), is found to improve the possibilities of discovering such Higgs states beyond those previously identified by considering H 0 , A 0 → χ 0 2 χ 0 2 decays only. In particular, H 0 , A 0 bosons with quite heavy masses, approaching ∼800 GeV in the so-called 'decoupling region' where no clear SM signatures for the heavier MSSM Higgs bosons are known to exist, can now be discerned, for suitable but not particularly restrictive configurations of the low energy supersymmetric parameters. The high M A discovery reach for the H 0 and A 0 may thus be greatly extended. Full event-generator level simulations, including realistic detector effects and analyses of all significant backgrounds, are performed to delineate the potential H 0 , A 0 discovery regions. The wedgebox plot technique is also utilized to further analyze the 4ℓ plus missing transverse energy signal and background events. This study marks the first thorough and reasonably complete analysis of this important class of MSSM Higgs boson signature modes. In fact, this is the first time discovery regions including all possible neutralino and chargino decay modes of the Higgs bosons have ever been mapped out. 4 The decays H 0 , A 0 → χ + 1 χ − 1 , χ 0 1 χ 0 2 were also studied in [7] but found to be unproductive due to large backgrounds to the resulting di-lepton signals.5 A preliminary account of this analysis is given in Ref. [24]. 6 Similar studies for charged Higgs boson decays into a neutralino and a chargino, where the charged Higgs boson is produced in association with a t ort quark are done in [13,20] (see also Refs. [25,26]).

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Extracting MSSM masses from heavy Higgs boson decays to four leptons at the CERN LHC

Cited by 10 publications

References 26 publications

On measuring Split-SUSY neutralino and chargino masses at the LHC

On measuring Split-SUSY neutralino and chargino masses at the LHC

A review of the mass measurement techniques proposed for the Large Hadron Collider

Four-lepton LHC events from MSSM Higgs boson decays into neutralino and chargino pairs

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