Visible Cascade Higgs Decays to Four Photons at Hadron Colliders
- Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, New York 10003 (United States)
- Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
The presence of a new singlet scalar particle a can open up new decay channels for the Higgs boson, through cascades of the form h{yields}2a{yields}X, possibly making discovery through standard model channels impossible. If a is CP odd, its decays are particularly sensitive to new physics. Quantum effects from heavy fields can naturally make h{yields}4g the dominant decay which is difficult to observe at hadron colliders, and is allowed by CERN LEP for m{sub h}>82 GeV. However, there are usually associated decays, either h{yields}2g2{gamma} or h{yields}4{gamma}, which are more promising. The decay h{yields}4{gamma} is a clean channel that can discover both a and h. At the CERN LHC with 300 fb{sup -1} of luminosity, a branching ratio of order 10{sup -4} is sufficient for discovery for a large range of Higgs boson masses. With total luminosity of {approx}8 fb{sup -1}, discovery at the Fermilab Tevatron requires more than 5x10{sup -3} in branching ratio.
- OSTI ID:
- 20957746
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 11; Other Information: DOI: 10.1103/PhysRevLett.98.111802; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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