A search for doubly charged Higgs production in Z0 decays

Acton, P. D.; Alexander, G.; Allison, J.; Allport, P. P.; Anderson, K. J.; Arcelli, S.; Astbury, A.; Axen, D.; Azuelos, G.; Bahan, G. A.; Baines, J. T.; Ball, A. H.; Banks, J.; Barlow, R. J.; Barnett, S.; Batley, J. R.; Beaudoin, G.; Beck, A.; Becker, J.; Behnke, T.; Bell, K. W.; Bella, G.; Berlich, P.; Bethke, S.; Biebel, O.; Binder, U.; Bloodworth, I. J.; Bock, P.; Boden, B.; Bosch, H. M.; Bougerolle, S.; Breuker, H.; Brown, R. M.; Buijs, A.; Burckhart, H.; Burgard, C.; Capiluppi, P.; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Clarke, P. E.L.; Cohen, I.; Clayton, J. C.; Collins, W. J.; Conboy, J. E.; Cooper, M.; Coupland, M.; Cuffiani, M.; Dado, S.; Dallavalle, G. M.; Long, S. De; Pozo, L. A. del; Deng, Hui; Dieckmann, A.; Dittmar, M.; Dixit, M. S.; Silva, E. do Couto e; Duboscq, J. E.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Dumas, D. J.P.; Elcombe, P. A.; Estabrooks, P. G.; Etzion, E.; Evans, H.; Fabbri, F.; Fincke-Keeler, M.; Fischer, H. M.; Fong, D. G.; Foucher, M.; Gaidot, A.; Ganel, O.; Gary, J. W.; Gascon, J.; McGowan, R. F.; Geddes, N. I.; Geich-Gimbel, Ch.; Gensler, S. W.; Gentit, F. X.; Giacomelli, G.; Gibson, V.; Gibson, W. R.; Gillies, J. D.; Goldberg, J.; Goodrick, M. J.; Gorn, W.; Grandi, C.; Grant, F. C.; Hagemann, J.; Hanson, G.; Hansroul, M.; Hargrove, C. K.; Harrison, P. F.; Hart, J. C.; Hattersley, P. M.; Hauschild, M.; Hawkes, C. M.; Heflin, E.; Hemingway, R. J.; Heuer, R. D.; Hill, J. C.; Hillier, S. J.; Hilse, T.; Hinshaw, D. A.; Hobbs, J.; Hobson, P. R.; Hochman, D.; Homer, R. J.; Honma, A. K.; Howarth, C. P.; Hughes-Jones, R. E.; Humbert, R.; Igo‐Kemenes, P.; Ihssen, H.; Imrie, D. C.; Janissen, A. C.; Jawahery, A.; Jeffreys, P. W.; Jérémie, H.; Jimack, M.; Jobes, M.; Jones, Roger; Jovanović, P.; Jui, C.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R.; Kellogg, R. G.; Kennedy, B. W.; Kluth, S.; Kobayashi, T.; Kokott, T. P.; Komamiya, S.; Köpke, L.; Král, J.; Kowalewski, R.; Krogh, J. von; Kroll, J.; Kuwano, M.; Kyberd, P.; Lafferty, G. D.; Lamarche, F.; Layter, J. G.; Dû, P. Le; Leblanc, P.; Lee, A. M.; Lehto, M. H.; Lellouch, D.; Lennert, P.; Leroy, C.; Letts, J.; Levegrün, S.; Levinson, L. J.; Lloyd, S. L.; Loebinger, F. K.; Lorah, J. M.; Lorazo, B.; Losty, M. J.; Lou, X.; Ludwig, J.; Mannelli, M.; Marcellini, S.; Maringer, G.; Markus, C.; Martín, A.; Martín, J. P.; Mäshimo, T.; Mättig, P.; Maur, U.; McKenna, J. A.; McMahon, Thomas J.; McNutt, J. R.; Meijers, F.; Menszner, D.; Merritt, F. S.; Mes, H.; Michelini, A.; Middleton, R. P.; Mikenberg, G.; Mildenberger, J.; Miller, D. J.; Mir, R.; Mohr, W.; Moisan, C.; Montanari, A.; Mori, T.; Morii, M.; Mouthuy, T.; Nellen, B.; Nguyen, H. H.; Nozaki, M.; O’Neale, S. W.; Oakham, F. G.; Odorici, F.; Ogren, H. O.; Oram, C. J.; Oreglia, M. J.; Orito, S.; Pansart, J. P.; Panzer-Steindel, B.; Paschievici, P.; Patrick, G. N.; Paz-Jaoshvili, N.; Pfister, P.; Pinfold, James; Pitman, D.; Plane, D. E.; Poffenberger, P.; Poli, B.; Pouladdej, A.; Prebys, E.; Pritchard, T. W.; Przysiezniak, H.; Quast, G.; Redmond, M. W.; Rees, D. L.; Richards, G. E.; Robinson, D.; Rollnik, A.; Roney, J. M.; Ros, E.; Rossberg, S.; Rossi, A. M.; Rosvick, M.; Routenburg, P.; Runge, K.; Runólfsson, Ö.; Rust, D. R.; Sasaki, M.; Sbarra, C.; Schaile, A. D.; Schaile, O.; Schappert, W.; Scharff-Hansen, P.; Schenk, P.; Schmitt, H. von der; Schreiber, S.; Schwick, C.; Schwiening, J.; Scott, W. G.; Settles, M.; Shears, T.; Shen, B. C.; Shepherd-Themistocleus, C. H.; Sherwood, P.; Shypit, R.; Simon, A.; Singh, P.; Siroli, G. P.; Skuja, A.; Smith, A. M.; Smith, T. J.; Snow, G. A.; Sobie, R.; Springer, R. W.; Sproston, M.; Stephens, K.; Steuerer, J.; Ströhmer, R.; Strom, D.; Takeshita, T.; Taras, P.; Tarem, S.; Tecchio, M.; Teixeira-Dias, P.; Tesch, N.; Thackray, N. J.; Tranströmer, G.; Tresilian, N. J.; Tsukamoto, T.; Turner, M.; Tysarczyk-Niemeyer, G.; plas, D. Van den; Kooten, R. Van; VanDalen, G. J.; Vasseur, G.; Virtue, C. J.; Wagner, A.; Wagner, D. L.; Wahl, C.; Walker, J. P.; Ward, C. P.; Ward, D. R.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Weber, M.; Weber, P.; Weisz, S.; Wells, P. S.; Wermes, N.; Whalley, M. A.; Wilson, G. W.; Wilson, J. A.; Winterer, V. H.; Włodek, T.; Wotton, S. A.; Wyatt, T. R.; Yaari, R.; Yeaman, A.; Yekutieli, G.; Yurko, M.; Zeuner, W. D.; Zorn, G. T.

doi:10.1016/0370-2693(92)91577-v

Cited by 23 publications

(10 citation statements)

References 32 publications

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“…Besides such a scenario, we find no other mass bound available from hadron colliders otherwise. The precision measurements of the Z boson decay width at the LEP have constrained the doubly charged Higgs boson mass to be above m Z /2 [19]. 1 In this paper, we study the scenario where the triplet VEV is sufficiently large so that the doubly charged Higgs bosons decay dominantly into a pair of weak gauge bosons instead.…”

Section: Introductionmentioning

confidence: 99%

Search for doubly charged Higgs bosons using the same-sign diboson mode at the LHC

2012

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Doubly charged Higgs bosons are predicted in many new physics models with an extended Higgs sector that contains a Higgs triplet field. Current experimental searches have been focusing mainly on the scenario in which the same-sign dilepton decay modes are the dominant ones. We study the scenario where the vacuum expectation value of the triplet field is sufficiently large so that the associated charged Higgs bosons decay dominantly to a pair of weak gauge bosons instead. A detailed simulation of the signal and the backgrounds is performed for the CERN Large Hadron Collider at the collision energy of 8 TeV and 14 TeV. We find that different cuts should be imposed for the events, depending on whether the doubly charged Higgs boson mass is greater than about 200 GeV. In the higher mass region, the forward jet tagging proves to be useful in enhancing the signal significance. We show the discovery reach of the LHC running at 8 and 14 TeV, with two benchmark triplet vacuum expectation values. With an integrated luminosity of 10 fb −1 at 8 TeV, the doubly charged Higgs boson with a mass of ∼ 180 GeV can be tested at 5σ level in such a scenario.

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Section: Introductionmentioning

confidence: 99%

Search for doubly charged Higgs bosons using the same-sign diboson mode at the LHC

2012

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“…This is the case if the Yukawa coupling is rather large and the triplet vev is small. As mentioned earlier, the first two signatures have been sought for [5,6], but the last possibility has hitherto overlooked. In this case, a mass limit for H ++ can still be derived from the total Z width.…”

Section: )mentioning

confidence: 99%

“…In this case, a mass limit for H ++ can still be derived from the total Z width. Reference [6] gives a limit of 30.4 GeV (95%CL) for Y = 1. Direct search for the eight-fermion final states would improve the bound up to the kinematical limit of 45 GeV.…”

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confidence: 99%

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Four-fermion decay of Higgs bosons

Asaka

Hikasa

1995

Physics Letters B

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We calculate four-fermion decays of a Higgs boson via W W and/or ZZ intermediate states for Higgs masses below m W . We examine models with a doublycharged Higgs boson H ++ and show that the four-fermion decay is the dominant mode for a wide range of parameter space. Existing searches for H ++ in Z decays have not looked for this mode. We also derive four-fermion decay rate for a neutral Higgs boson.

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“…Theoretically, the production mechanism of doubly-charged Higgs bosons at the Large Hadron Collider (LHC) have been widely studied in the literature [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Direct searches for H ±± have been performed by several collaborations: OPAL [22], L3 [23] and DELPHI [24] at LEP; H1 [25] at HERA; CDF [26] and D0 [27] at Tevatron; and also by CMS [28] and ATLAS [29,30] at the LHC. Up to date such particles have not yet been observed experimentally and their non-observation have provided strong constraints on their masses.…”

Section: Introductionmentioning

confidence: 99%

Lepton-number-violating decays of heavy flavors induced by doubly-charged Higgs boson

Quintero

2013

Phys. Rev. D

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We study lepton-number-violating (LNV) decays of heavy flavors (τ lepton and top quark) induced by doubly-charged Higgs boson in the Higgs triplet model. It is found that the branching fractions of LNV τ − → ℓ + M − 1 M − 2 decays are highly suppressed compared with the current experimental limits. On the other hand, for LNV top quark decays, the most optimistic branching ratios for t → bℓ + ℓ + W − turn out to be at the level of ∼ 10 −7 − 10 −8 . The observation of these rare top quark decays would be a clear signal of LNV processes, and their non-observation would allow us to constraint the parameters of the Higgs triplet model.

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A search for doubly charged Higgs production in Z0 decays

Cited by 23 publications

References 32 publications

Search for doubly charged Higgs bosons using the same-sign diboson mode at the LHC

Search for doubly charged Higgs bosons using the same-sign diboson mode at the LHC

Four-fermion decay of Higgs bosons

Lepton-number-violating decays of heavy flavors induced by doubly-charged Higgs boson

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