User menu

Accès à distance ? S'identifier sur le proxy UCLouvain

Constraints on a little Higgs model with fully radiative electroweak symmetry breaking

Primary tabs

download
  • Open access
  • PDF
  • 534.37 K
Foadi, Roshan [UCL] Schmidt, Carl R. [Michigan State U.] Yu, Jiang-Hao [Michigan State U.]

In a recent paper, we introduced a new Little Higgs model, which contains the gauge structure SU(2)3×U(1) embedded in an approximate global SO(5)×SO(5) symmetry. After breaking to the standard model, SU(2)L×U(1)Y, this produces two heavy Z′ bosons and two heavy W′± bosons along with a single standard model-like Higgs scalar. The unique feature of the model was that it was possible to obtain electroweak symmetry breaking and a light Higgs mass entirely from perturbative loop contributions to the Higgs effective potential. In this paper, we consider the electroweak constraints on this model, including tree and loop contributions to the universal oblique and nonoblique parameters, tree-level corrections to the ZWW vertex, and tree- and loop-level corrections to Zbb̅ . The most significant corrections are positive tree-level corrections to Ŝ and negative fermion-loop corrections to T̂, which require that the scale for the global symmetry breaking be ≳2  TeV, depending on the top-quark mixing parameter and the extra gauge couplings. In addition, the loop corrections to Zbb̅ contain a divergence that must be absorbed into the coefficient of a new operator in the theory. The finite part of this Zbb̅ correction, however, is negligible.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 2012
Language Anglais
Journal information "Physical Review. D, Particles, Fields, Gravitation and Cosmology" - Vol. 85, no.5, p. 055015 (13 pages) (2012)
Peer reviewed yes
Publisher American Physical Society ((United States) [S.l.])
issn 1550-7998
e-issn 1089-4918
Publication status Publié
Affiliation UCL - SST/IRMP - Institut de recherche en mathématique et physique
Links
  1. Georgi Howard, Pais A., Vacuum symmetry and the pseudo-Goldstone phenomenon, 10.1103/physrevd.12.508
  2. Arkani-Hamed Nima, Cohen Andrew G, Katz Emanuel, Nelson Ann E, Gregoire Thomas, Wacker Jacob G, The Minimal Moose for a Little Higgs, 10.1088/1126-6708/2002/08/021
  3. Arkani-Hamed Nima, Cohen Andrew G, Katz Emanuel, Nelson Ann E, The Littlest Higgs, 10.1088/1126-6708/2002/07/034
  4. Schmaltz Martin, The Simplest Little Higgs, 10.1088/1126-6708/2004/08/056
  5. Schmaltz Martin, Physics beyond the standard model (Theory): Introducing the Little Higgs, 10.1016/s0920-5632(03)01409-9
  6. Foadi Roshan, Laverty James T., Schmidt Carl R., Yu Jiang-Hao, Radiative electroweak symmetry breaking in a Little Higgs model, 10.1007/jhep06(2010)026
  7. Casalbuoni R., De Curtis S., Dolce D., Dominici D., Playing with fermion couplings in Higgsless models, 10.1103/physrevd.71.075015
  8. E. Accomando, Nuovo Cimento Soc. Ital. Fis. B, 123, 809 (2008)
  9. Hsieh Ken, Schmitz Kai, Yu Jiang-Hao, Yuan C.-P., Global analysis of generalSU(2)×SU(2)×U(1)models with precision data, 10.1103/physrevd.82.035011
  10. Medina Anibal D., Shah Nausheen R., Wagner Carlos E. M., Gauge-Higgs unification and radiative electroweak symmetry breaking in warped extra dimensions, 10.1103/physrevd.76.095010
  11. Panico Giuliano, Wulzer Andrea, The discrete composite Higgs model, 10.1007/jhep09(2011)135
  12. Barbieri Riccardo, Pomarol Alex, Rattazzi Riccardo, Strumia Alessandro, Electroweak symmetry breaking after LEP1 and LEP2, 10.1016/j.nuclphysb.2004.10.014
  13. Chivukula R. Sekhar, Simmons Elizabeth H., He Hong-Jian, Kurachi Masafumi, Tanabashi Masaharu, Universal non-oblique corrections in Higgsless models and beyond, 10.1016/j.physletb.2004.10.026
  14. Hagiwara K., Peccei R.D., Zeppenfeld D., Hikasa K., Probing the weak boson sector in e+e−→W+W−, 10.1016/0550-3213(87)90685-7
  15. Chivukula R. Sekhar, Coleppa Baradhwaj, Chiara Stefano Di, Simmons Elizabeth H., He Hong-Jian, Kurachi Masafumi, Tanabashi Masaharu, A Three site Higgsless model, 10.1103/physrevd.74.075011
  16. Nakamura K, , Review of Particle Physics, 10.1088/0954-3899/37/7a/075021
  17. Chivukula R. Sekhar, Di Chiara Stefano, Foadi Roshan, Simmons Elizabeth H., Limits of custodial symmetry, 10.1103/physrevd.80.095001
  18. Chivukula R. Sekhar, Foadi Roshan, Simmons Elizabeth H., Patterns of custodial isospin violation from a composite top, 10.1103/physrevd.84.035026
  19. Larios F., Pérez M.A., Yuan C.-P., Analysis of t-b-W and t-t-Z couplings from CLEO and LEP/SLC data, 10.1016/s0370-2693(99)00541-9
  20. Berger Edmond L., Cao Qing-Hong, Low Ian, Model independent constraints among theWtb,Zbb¯, andZtt¯couplings, 10.1103/physrevd.80.074020
  21. Aguilar-Saavedra J.A., Single top quark production at LHC with anomalous Wtb couplings, 10.1016/j.nuclphysb.2008.06.013
  22. Lytel Richard S., Weak-isospin breaking and higher-order corrections, 10.1103/physrevd.22.505
  23. Barbieri Riccardo, Beccaria Matteo, Ciafaloni Paolo, Curci Giuseppe, Viceré Andrea, Radiative correction effects of a very heavy top, 10.1016/0370-2693(92)91960-h
  24. Erratum, 10.1016/0370-2693(93)90990-y
  25. Barbieri Riccardo, Beccaria Matteo, Ciafaloni Paolo, Curci Giuseppe, Viceré Andrea, Two-loop heavy-top effects in the Standard Model, 10.1016/0550-3213(93)90448-x
  26. Oliver J. F., Papavassiliou J., Santamaria A., Universal extra dimensions andZ→bb¯, 10.1103/physrevd.67.056002
  27. Abe Tomohiro, Chivukula R. Sekhar, Christensen Neil D., Hsieh Ken, Matsuzaki Shinya, Simmons Elizabeth H., Tanabashi Masaharu, Z→bb¯and chiral currents in Higgsless models, 10.1103/physrevd.79.075016
Bibliographic reference Foadi, Roshan ; Schmidt, Carl R. ; Yu, Jiang-Hao. Constraints on a little Higgs model with fully radiative electroweak symmetry breaking. In: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 85, no.5, p. 055015 (13 pages) (2012)
Permanent URL http://hdl.handle.net/2078.1/131030