×

Dileptonic signatures of \(T\)-odd quarks at the LHC. (English) Zbl 1271.81193

Summary: Little Higgs models are often endowed with a \(T\)-parity in order to satisfy electroweak precision tests and give at the same time a stable particle which is a candidate for cold dark matter. This type of models predicts a set of new \(T\)-odd fermions in addition to the heavy gauge bosons of the Little Higgs models, which may show interesting signatures at colliders. In this paper, we study the signatures of strong and electroweak pair production of the first two generations of T-odd quarks at the LHC. We focus on the dileptonic signatures (a) \(pp \rightarrow \ell^{\pm} \ell^{\mp}\) \(jj \nearrow \mathbf{E}_{\mathbf{T}}\) (opposite-sign dileptons) and (b) \(pp \rightarrow \ell^{\pm} \ell^{\pm}\) \(jj \nearrow \mathbf{E}_{\mathbf{T}}\) (same-sign dileptons).

MSC:

81V22 Unified quantum theories
81R05 Finite-dimensional groups and algebras motivated by physics and their representations
PDFBibTeX XMLCite
Full Text: DOI arXiv

References:

[1] R. Barbieri and A. Strumia, The ’LEP paradox’, hep-ph/0007265 [SPIRES].
[2] M. Schmaltz and D. Tucker-Smith, Little higgs review, Ann. Rev. Nucl. Part. Sci.55 (2005) 229 [hep-ph/0502182] [SPIRES]. · doi:10.1146/annurev.nucl.55.090704.151502
[3] M. Perelstein, Little higgs models and their phenomenology, Prog. Part. Nucl. Phys.58 (2007) 247 [hep-ph/0512128] [SPIRES]. · doi:10.1016/j.ppnp.2006.04.001
[4] C. Csáki, J. Hubisz, G.D. Kribs, P. Meade and J. Terning, Big corrections from a little Higgs, Phys. Rev.D 67 (2003) 115002 [hep-ph/0211124] [SPIRES].
[5] C. Csáki, J. Hubisz, G.D. Kribs, P. Meade and J. Terning, Variations of little Higgs models and their electroweak constraints, Phys. Rev.D 68 (2003) 035009 [hep-ph/0303236] [SPIRES].
[6] T. Gregoire, D. Tucker-Smith and J.G. Wacker, What precision electroweak physics says about the SU(6)/Sp(6) little Higgs, Phys. Rev.D 69 (2004) 115008 [hep-ph/0305275] [SPIRES].
[7] R. Casalbuoni, A. Deandrea and M. Oertel, Little Higgs models and precision electroweak data, JHEP02 (2004) 032 [hep-ph/0311038] [SPIRES]. · doi:10.1088/1126-6708/2004/02/032
[8] W. Kilian and J. Reuter, The low-energy structure of little Higgs models, Phys. Rev.D 70 (2004) 015004 [hep-ph/0311095] [SPIRES].
[9] G. Marandella, C. Schappacher and A. Strumia, Little-Higgs corrections to precision data after LEP2, Phys. Rev.D 72 (2005) 035014 [hep-ph/0502096] [SPIRES].
[10] Z. Han and W. Skiba, Little Higgs models and electroweak measurements, Phys. Rev.D 72 (2005) 035005 [hep-ph/0506206] [SPIRES].
[11] H.-C. Cheng and I. Low, TeV symmetry and the little hierarchy problem, JHEP09 (2003) 051 [hep-ph/0308199] [SPIRES]. · doi:10.1088/1126-6708/2003/09/051
[12] H.-C. Cheng and I. Low, Little hierarchy, little Higgses and a little symmetry, JHEP08 (2004) 061 [hep-ph/0405243] [SPIRES]. · doi:10.1088/1126-6708/2004/08/061
[13] H.-C. Cheng, I. Low and L.-T. Wang, Top partners in little Higgs theories with T-parity, Phys. Rev.D 74 (2006) 055001 [hep-ph/0510225] [SPIRES].
[14] J. Hubisz, P. Meade, A. Noble and M. Perelstein, Electroweak precision constraints on the littlest Higgs model with T parity, JHEP01 (2006) 135 [hep-ph/0506042] [SPIRES]. · doi:10.1088/1126-6708/2006/01/135
[15] A. Birkedal, A. Noble, M. Perelstein and A. Spray, Little Higgs dark matter, Phys. Rev.D 74 (2006) 035002 [hep-ph/0603077] [SPIRES].
[16] D. Choudhury and D.K. Ghosh, LHC signals of T-odd heavy quarks in the littlest Higgs model, JHEP08 (2007) 084 [hep-ph/0612299] [SPIRES]. · doi:10.1088/1126-6708/2007/08/084
[17] T. Goto, Y. Okada and Y. Yamamoto, Ultraviolet divergences of flavor changing amplitudes in the littlest Higgs model with T-parity, Phys. Lett.B 670 (2009) 378 [arXiv:0809.4753] [SPIRES]. · doi:10.1016/j.physletb.2008.11.022
[18] F. del Aguila, J.I. Illana and M.D. Jenkins, Precise limits from lepton flavour violating processes on the Littlest Higgs model with T-parity, JHEP01 (2009) 080 [arXiv:0811.2891] [SPIRES]. · doi:10.1088/1126-6708/2009/01/080
[19] M. Blanke, A.J. Buras, B. Duling, S. Recksiegel and C. Tarantino, FCNC processes in the littlest Higgs model with T-parity: a 2009 look, arXiv:0906.5454 [SPIRES].
[20] A. Freitas and D. Wyler, Phenomenology of mirror fermions in the littlest Higgs model with T-parity, JHEP11 (2006) 061 [hep-ph/0609103] [SPIRES]. · doi:10.1088/1126-6708/2006/11/061
[21] A. Belyaev, C.-R. Chen, K. Tobe and C.P. Yuan, Phenomenology of littlest Higgs model with T−parity: including effects of T−odd fermions, Phys. Rev.D 74 (2006) 115020 [hep-ph/0609179] [SPIRES].
[22] M.S. Carena, J. Hubisz, M. Perelstein and P. Verdier, Collider signature of T-quarks, Phys. Rev.D 75 (2007) 091701 [hep-ph/0610156] [SPIRES].
[23] D0 collaboration, V.M. Abazov et al., Search for scalar leptoquarks and T -odd quarks in the acoplanar jet topology using 2.5 fb−1of \(p\bar p\) collision data at \(\sqrt s = 1.96 - TeV \), Phys. Lett.B 668 (2008) 357 [arXiv:0808.0446] [SPIRES].
[24] E. Richter-Was et al., ATLFAST 2.2: A fast simulation package for ATLAS, ATL-PHYS-98-131.
[25] I. Low, T parity and the littlest Higgs, JHEP10 (2004) 067 [hep-ph/0409025] [SPIRES]. · doi:10.1088/1126-6708/2004/10/067
[26] J. Hubisz and P. Meade, Phenomenology of the littlest Higgs with T-parity, Phys. Rev.D 71 (2005) 035016 [hep-ph/0411264] [SPIRES].
[27] J. Hubisz, P. Meade, A. Noble and M. Perelstein, Electroweak precision constraints on the littlest Higgs model with T parity, JHEP01 (2006) 135 [hep-ph/0506042] [SPIRES]. · doi:10.1088/1126-6708/2006/01/135
[28] P. Dey, S.K. Gupta and B. Mukhopadhyaya, The impossibility of heavy neutrino dark matter in the Littlest Higgs Model with T-parity: constraints from direct search, Phys. Lett.B 674 (2009) 188 [arXiv:0809.3893] [SPIRES].
[29] M. Blanke et al., Rare and CP-violating K and B decays in the littlest Higgs model with T−parity, JHEP01 (2007) 066 [hep-ph/0610298] [SPIRES]. · doi:10.1088/1126-6708/2007/01/066
[30] M. Blanke, A.J. Buras, S. Recksiegel, C. Tarantino and S. Uhlig, Correlations between ϵ′/ϵ and rare K decays in the littlest Higgs model with T-parity, JHEP06 (2007) 082 [arXiv:0704.3329] [SPIRES]. · doi:10.1088/1126-6708/2007/06/082
[31] I.I. Bigi, M. Blanke, A.J. Buras and S. Recksiegel, CP violation in \({D^0} - {\bar D^0}\) oscillations: general considerations and applications to the littlest Higgs model with T-parity, JHEP07 (2009) 097 [arXiv:0904.1545] [SPIRES]. · doi:10.1088/1126-6708/2009/07/097
[32] S.R. Choudhury, A.S. Cornell, A. Deandrea, N. Gaur and A. Goyal, Lepton flavour violation in the little Higgs model, Phys. Rev.D 75 (2007) 055011 [hep-ph/0612327] [SPIRES].
[33] M. Blanke, A.J. Buras, B. Duling, A. Poschenrieder and C. Tarantino, Charged lepton flavour violation and (g − 2)μin the littlest Higgs model with T-parity: a clear distinction from supersymmetry, JHEP05 (2007) 013 [hep-ph/0702136] [SPIRES]. · doi:10.1088/1126-6708/2007/05/013
[34] N. Gaur, Charged lepton flavour violation in littlest Higgs model with T-parity, AIP Conf. Proc.981 (2008) 357 [arXiv:0710.3998] [SPIRES]. · doi:10.1063/1.2898987
[35] H.-C. Cheng, I. Low and L.-T. Wang, Top partners in little Higgs theories with T-parity, Phys. Rev.D 74 (2006) 055001 [hep-ph/0510225] [SPIRES].
[36] A. Pukhov, Calchep 2.3: MSSM, structure functions, event generation, 1 and generation of matrix elements for other packages, hep-ph/0412191 [SPIRES].
[37] J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP07 (2002) 012 [hep-ph/0201195] [SPIRES]. · doi:10.1088/1126-6708/2002/07/012
[38] J.R. Primack, D. Seckel and B. Sadoulet, Detection of cosmic dark matter, Ann. Rev. Nucl. Part. Sci.38 (1988) 751 [SPIRES]. · doi:10.1146/annurev.ns.38.120188.003535
[39] H. Burkhardt, Status of LHC machine, talk at Lepton-Photon 2009, Hamburg, Germany, August (2009).
[40] T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP05 (2006) 026 [hep-ph/0603175] [SPIRES]. · Zbl 1368.81015 · doi:10.1088/1126-6708/2006/05/026
[41] J. Alwall et al., A Les Houches interface for BSM generators, arXiv:0712.3311 [SPIRES].
[42] E. Boos et al., Generic user process interface for event generators, hep-ph/0109068 [SPIRES].
[43] J. Alwall et al., A standard format for Les Houches event files, Comput. Phys. Commun.176 (2007) 300 [hep-ph/0609017] [SPIRES]. · doi:10.1016/j.cpc.2006.11.010
[44] F. Maltoni and T. Stelzer, MadEvent: automatic event generation with MadGraph, JHEP02 (2003) 027 [hep-ph/0208156] [SPIRES]. · doi:10.1088/1126-6708/2003/02/027
[45] J.M. Campbell and R.K. Ellis, MCFM - Monte Carlo for FeMtobarn processes, http://mcfm.fnal.gov.
[46] P.M. Nadolsky et al., Implications of CTEQ global analysis for collider observables, Phys. Rev.D 78 (2008) 013004 [arXiv:0802.0007] [SPIRES].
[47] M. Cacciari, S. Frixione, M.L. Mangano, P. Nason and G. Ridolfi, Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC, JHEP09 (2008) 127 [arXiv:0804.2800] [SPIRES]. · doi:10.1088/1126-6708/2008/09/127
[48] J.M. Campbell, R. Frederix, F. Maltoni and F. Tramontano, NLO predictions for t-channel production of single top and fourth generation quarks at hadron colliders, JHEP10 (2009) 042 [arXiv:0907.3933] [SPIRES]. · doi:10.1088/1126-6708/2009/10/042
[49] J.M. Campbell and R.K. Ellis, Next-to-leading order corrections to W+2 jet and Z+2 jet production at hadron colliders, Phys. Rev.D 65 (2002) 113007 [hep-ph/0202176] [SPIRES].
[50] J.M. Campbell, R.K. Ellis and D.L. Rainwater, Next-to-leading order QCD predictions for W+2 jet and Z+2 jet production at the CERN LHC, Phys. Rev.D 68 (2003) 094021 [hep-ph/0308195] [SPIRES].
[51] CMS collaboration, G.L. Bayatian et al., CMS technical design report, volume II: Physics performance, J. Phys.G 34 (2007) 995 [SPIRES].
[52] G. Cacciapaglia, A. Deandrea, N. Gaur, M. Klasen, T-odd quark production in the Littlest Higgs model with T-parity at LHC, work in progress. · Zbl 1271.81193
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.