| Article | |
| Report number | arXiv:1301.3416 ; DESY-13-006 ; CERN-PH-TH-2013-007 ; HU-EP-13-1 ; DESY-13-006 ; CERN-PH-TH-2013-007 ; HU-EP-13-1 |
| Title | Constraining a fourth generation of quarks: non-perturbative Higgs boson mass bounds |
| Author(s) | Bulava, J. (CERN) ; Jansen, K. (NIC, Zeuthen) ; Nagy, A. (NIC, Zeuthen ; Humboldt U., Berlin) |
| Imprint | 16 Jan 2013. - 6 p. |
| Note | Comments: 6 pages, 2 figures 6 pages, 2 figures |
| In: | Phys. Lett. B 723 (2013) 95-99 |
| DOI | 10.1016/j.physletb.2013.04.041 |
| Subject category | Particle Physics - Lattice |
| Abstract | We present a non-perturbative determination of the upper and lower Higgs boson mass bounds with a heavy fourth generation of quarks from numerical lattice computations in a chirally symmetric Higgs-Yukawa model. We find that the upper bound only moderately rises with the quark mass while the lower bound increases significantly, providing additional constraints on the existence of a straight-forward fourth quark generation. We examine the stability of the lower bound under the addition of a higher dimensional operator to the scalar field potential using perturbation theory, demonstrating that it is not significantly altered for small values of the coupling of this operator. For a Higgs boson mass of $\sim125\mathrm{GeV}$ we find that the maximum value of the fourth generation quark mass is $\sim300\mathrm{GeV}$, which is already in conflict with bounds from direct searches. |
| Copyright/License | Preprint: © 2013-2024 CERN (License: CC-BY-3.0) |
Corresponding record in: Inspire
Record created 2013-01-17, last modified 2023-10-04
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