Abstract
State-of-the-art predictions for the Higgs-boson production cross section via gluon fusion and for all relevant Higgs-boson decay channels are presented in the presence of a fourth Standard-Model-like fermion generation. The qualitative features of the most important differences to the genuine Standard Model are pointed out, and the use of the available tools for the predictions is described. For a generic mass scale of 400−600 GeV in the fourth generation explicit numerical results for the cross section and decay widths are presented, revealing extremely large electroweak radiative corrections, e.g., to the cross section and the Higgs decay into WW or ZZ pairs, where they amount to about −50 % or more. This signals the onset of a non-perturbative regime due to the large Yukawa couplings in the fourth generation. An estimate of the respective large theoretical uncertainties is presented as well.
Similar content being viewed by others
References
S. Chatrchyan et al. (CMS Collaboration), Phys. Lett. B 701, 204–223 (2011). arXiv:1102.4746 [hep-ex]
M.M.H. Luk, arXiv:1110.3246 [hep-ex]
G. Aad et al. (ATLAS Collaboration), arXiv:1106.2748 [hep-ex]
CMS Collaboration, CMS-PAS-HIG-11-011
T. Aaltonen et al. (CDF Collaboration), Phys. Rev. Lett. 107, 261801 (2011). arXiv:1107.3875 [hep-ex]
T. Aaltonen et al. (The CDF Collaboration), Phys. Rev. Lett. 106, 141803 (2011). arXiv:1101.5728 [hep-ex]
T. Aaltonen et al. (CDF and D0 Collaboration), Phys. Rev. D 82, 011102 (2010). arXiv:1005.3216 [hep-ex]
C. Anastasiou, S. Buehler, E. Furlan, F. Herzog, A. Lazopoulos, Phys. Lett. B 702, 224–227 (2011). arXiv:1103.3645 [hep-ph]
C. Anastasiou, R. Boughezal, E. Furlan, J. High Energy Phys. 1006, 101 (2010). arXiv:1003.4677 [hep-ph]
M. Spira, arXiv:hep-ph/9510347
M. Spira, Nucl. Instrum. Methods A 389, 357–360 (1997). hep-ph/9610350
A. David, Implications of LHC results for TeV-scale physics, CERN, August 29, 2011, http://indico.cern.ch/conferenceOtherViews.py?view=standard&confId=141983
G. Passarino, C. Sturm, S. Uccirati, Phys. Lett. B 706, 195 (2011). arXiv:1108.2025 [hep-ph]
M.S. Chanowitz, M.A. Furman, I. Hinchliffe, Phys. Lett. B 78, 285 (1978)
M.S. Chanowitz, M.A. Furman, I. Hinchliffe, Nucl. Phys. B 153, 402 (1979)
G.D. Kribs, T. Plehn, M. Spannowsky, T.M.P. Tait, Phys. Rev. D 76, 075016 (2007). arXiv:0706.3718 [hep-ph]
M. Hashimoto, Phys. Rev. D 81, 075023 (2010). arXiv:1001.4335 [hep-ph]
M.E. Peskin, T. Takeuchi, Phys. Rev. D 46, 381 (1992)
O. Eberhardt, A. Lenz, J. Rohrwild, Phys. Rev. D 82, 095006 (2010). arXiv:1005.3505 [hep-ph]
J. Erler, P. Langacker, Phys. Rev. Lett. 105, 031801 (2010). arXiv:1003.3211 [hep-ph]
P. Gerhold, K. Jansen, J. Kallarackal, J. High Energy Phys. 1101, 143 (2011). arXiv:1011.1648 [hep-lat]
M. Baak, M. Goebel, J. Haller, A. Hoecker, D. Ludwig, K. Moenig, M. Schott, J. Stelzer, arXiv:1107.0975 [hep-ph]
C. Anastasiou, S. Buehler, F. Herzog, A. Lazopoulos, J. High Energy Phys. 1112, 058 (2011). arXiv:1107.0683 [hep-ph]
S. Goria, G. Passarino, D. Rosco, arXiv:1112.5517 [hep-ph]
G. Passarino, http://personalpages.to.infn.it/~giampier/CPHTO.html
H.M. Georgi, S.L. Glashow, M.E. Machacek, D.V. Nanopoulos, Phys. Rev. Lett. 40, 692 (1978)
M. Spira, A. Djouadi, D. Graudenz, P.M. Zerwas, Nucl. Phys. B 453, 17–82 (1995). arXiv:hep-ph/9504378 [hep-ph]
A. Djouadi, P. Gambino, Phys. Rev. Lett. 73, 2528–2531 (1994). hep-ph/9406432
A. Djouadi, P. Gambino, B.A. Kniehl, Nucl. Phys. B 523, 17–39 (1998). hep-ph/9712330
F. Fugel, B.A. Kniehl, M. Steinhauser, Nucl. Phys. B 702, 333–345 (2004). hep-ph/0405232
S. Actis, G. Passarino, C. Sturm, S. Uccirati, Nucl. Phys. B 811, 182–273 (2009). arXiv:0809.3667 [hep-ph]
S. Actis, G. Passarino, C. Sturm, S. Uccirati, Phys. Lett. B 670, 12–17 (2008). arXiv:0809.1301 [hep-ph]
C. Anastasiou, R. Boughezal, F. Petriello, J. High Energy Phys. 0904, 003 (2009). arXiv:0811.3458 [hep-ph]
A. Bredenstein, A. Denner, S. Dittmaier, A. Mück, M.M. Weber, Prophecy4f: A Monte Carlo generator for a proper description of the Higgs decay into 4 fermions, http://omnibus.uni-freiburg.de/~sd565/programs/prophecy4f/prophecy4f.html (2010)
A. Bredenstein, A. Denner, S. Dittmaier, M.M. Weber, Phys. Rev. D 74, 013004 (2006). hep-ph/0604011
A. Bredenstein, A. Denner, S. Dittmaier, M.M. Weber, J. High Energy Phys. 0702, 080 (2007). hep-ph/0611234
A. Bredenstein, A. Denner, S. Dittmaier, M.M. Weber, arXiv:0708.4123 [hep-ph]
B.A. Kniehl, Phys. Rev. D 53, 6477–6485 (1996). hep-ph/9602304
A. Djouadi, J. Kalinowski, M. Spira, Comput. Phys. Commun. 108, 56–74 (1998). hep-ph/9704448
M. Spira, Fortschr. Phys. 46, 203–284 (1998). hep-ph/9705337
A. Djouadi, J. Kalinowski, M. Mühlleitner, M. Spira, An update of the program HDECAY, appeared in J.M. Butterworth et al., arXiv:1003.1643 [hep-ph]
T. Inami, T. Kubota, Y. Okada, Z. Phys. C 18, 69 (1983)
A. Djouadi, M. Spira, P.M. Zerwas, Phys. Lett. B 264, 440–446 (1991)
K.G. Chetyrkin, B.A. Kniehl, M. Steinhauser, Phys. Rev. Lett. 79, 353–356 (1997). hep-ph/9705240
P.A. Baikov, K.G. Chetyrkin, Phys. Rev. Lett. 97, 061803 (2006). hep-ph/0604194
A. Djouadi, M. Spira, J.J. van der Bij, P.M. Zerwas, Phys. Lett. B 257, 187–190 (1991)
A. Djouadi, M. Spira, P.M. Zerwas, Phys. Lett. B 311, 255–260 (1993). arXiv:hep-ph/9305335 [hep-ph]
K. Melnikov, O.I. Yakovlev, Phys. Lett. B 312, 179 (1993). arXiv:hep-ph/9302281
M. Inoue, R. Najima, T. Oka, J. Saito, Mod. Phys. Lett. A 9, 1189 (1994)
M. Spira, A. Djouadi, P.M. Zerwas, Phys. Lett. B 276, 350–353 (1992)
A.D. Martin, W.J. Stirling, R.S. Thorne, G. Watt, Eur. Phys. J. C 63, 189–285 (2009). arXiv:0901.0002 [hep-ph]
S. Dittmaier et al. (LHC Higgs Cross Section Working Group Collaboration), arXiv:1101.0593 [hep-ph]
A. Denner, S. Heinemeyer, I. Puljak, D. Rebuzzi, M. Spira, Eur. Phys. J. C 71, 1753 (2011). arXiv:1107.5909 [hep-ph]
Author information
Authors and Affiliations
Consortia
Corresponding author
Rights and permissions
About this article
Cite this article
LHC Higgs Cross Section Working Group., Denner, A., Dittmaier, S. et al. Higgs production and decay with a fourth Standard-Model-like fermion generation. Eur. Phys. J. C 72, 1992 (2012). https://doi.org/10.1140/epjc/s10052-012-1992-3
Received:
Revised:
Published:
DOI: https://doi.org/10.1140/epjc/s10052-012-1992-3