### Many Other Higgses

In general, Higgs particles arrise in any model with a broken local gauge symmetry. In models extending the Standard Model, there can be more than one Higgs particle.

Conveners: Andreas Jung (Fermilab), Slava Sharyy (CEA-Saclay), Boris Tuchming (CEA-Saclay)

Click here to go to top group web page

Higgs bosons appear in theories with broken local gauge symmetries. In the Standard Model, the Higgs mechanism is the last piece of the puzzle that remained for a long time to be discovered or ruled out until it was discovered in 2012 at CERN. Unification of the weak force and the electromagnetic force is achieved via the Higgs coupling to the electroweak gauge bosons. This interaction imparts a large "effective" mass to the weak vector bosons and reduces the range of the weak interaction, hence making the weak force "weak". This effective mass depends on the coupling between the particle and the massive Higgs boson.

## Quest for the HiggsThere is abundant evidence that the Higgs particle in the Standard Model is light. Consistency of the standard model places some loose bounds on the range of the Higgs mass possible from theory. Indirect evidence from fits to the electroweak observables points to the preferred mass of the Higgs at 89+29-24 GeV at 68% C.L. (updated March 2012). However, the sensitivity of the fit can only constrain the Higgs mass to be below 152 GeV at the 95% C.L. confidence level (without LEP 2 direct search limit).
In 2000, after the final LEP shutdown,
direct searches
from LEP 2 experiments placed the lower limit on the Higgs mass at
M | |

The final D0 results on the Higgs, which are based on the full Tevatron Run II (2001-2011) dataset, are now published in Phys. Rev. D 88, 052011 (2013), also in arXiv:1303.0823. They have been combined with the CDF analyses to provide the final Tevatron results on the Higgs, published in Phys. Rev. D 88, 052014 (2013), also in arXiv:1303.6346. Both figures on the left are extract from the later Article.
The top left figure illustrates the final Tevatron limits on
Higgs bosons production in the range 90 ≤ M |

In general, Higgs particles arrise in any model with a broken local gauge symmetry. In models extending the Standard Model, there can be more than one Higgs particle.

SM Higgs searchesAt the
Tevatron, the dominant production channel for M |
Exotic Higgs searchesDoubly
charged Higgs bosons (H |

W/Z+jets measurements These are important physics and instrumental backgrounds to Higgs searches at the Tevatron. Even with NLO calculations, these are predicted with large theoretical uncertainties. We are going to measure W/Z+ jets, with and without b-tagging. |
Search for MSSM Higgs
There are 2 Higgs doublets in the mimimal supersymmetric
standard model (MSSM), which couple to particles of different weak
isospin. This woudl give rise to 5 Higgs bosons (H |