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Dark side of the Higgs boson

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Title: Dark side of the Higgs boson
Author(s): Low, Ian; Schwaller, Pedro; Shaughnessy, Gabe; Wagner, Carlos E. M.
Abstract: Current limits from the Large Hadron Collider exclude a standard model-like Higgs mass above 150 GeV, by placing an upper bound on the Higgs production rate. We emphasize that, alternatively, the limit could be interpreted as a lower bound on the total decay width of the Higgs boson. If the invisible decay width of the Higgs is of the same order as the visible decay width, a heavy Higgs boson could be consistent with null results from current searches. We propose a method to infer the invisible decay of the Higgs by using the width of the measured h -> ZZ -> 4l line shape, and study the effect on the width extraction due to a reduced signal strength. Assuming the invisible decay product is the dark matter, we show that minimal models are tightly constrained by limits from Higgs searches at the LHC and direct detection experiments of dark matter, unless the relic density constraint is relaxed.
Issue Date: 2012-01
Publisher: American Physical Society
Citation Info: Low, I., Schwaller, P., Shaughnessy, G., & Wagner, C. E. M. 2012. Dark side of the Higgs boson. Physical Review D, 85(1):015009. DOI: 10.1103/PhysRevD.85.015009
Type: Article
Description: Ian Low Pedro Schwaller, Gabe Shaughnessy, and Carlos E. M. Wagner, Physical Review D, volume 85, Article Number: 015009, 2012. © (2012) by the American Physical Society." DOI: 10.1103/PhysRevD.85.015009
URI: http://hdl.handle.net/10027/8473
ISSN: 1550-7998
Sponsor: This work is supported in part by the U.S. Department of Energy under Grant Nos. DE-AC02-06CH11357, DE-FG02- 84ER40173, DE-FG02-91ER40684, and DE-FG02- 95ER40896.
Date Available in INDIGO: 2012-08-15
 

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