108 research outputs found
Angular momentum content of a virtual graviton
We show that a virtual graviton has a J=0 component, which serves to cancel
the J=2, J_z=0 component when the graviton is on shell. In contrast, a massive
graviton has no J=0 component either on or off shell. This difference is
responsible for the van Dam-Veltman-Zakharov discontinuity.Comment: 5 pages. Reference adde
Neutrino-photon Scattering in a Magnetic Field
Previous calculations of photon-neutrino scattering in a constant background
magnetic field are extended and corrected.Comment: Corrections to the labeling of the entries in Table
Searching for the Higgs Bosons of Minimal Supersymmetry with Muon Pairs and Bottom Quarks
The prospects for the discovery of neutral Higgs bosons (phi^0 = H^0, h^0,
A^0) produced with bottom quarks via Higgs decays into muon pairs (pp --> b
b-bar phi^0 --> b b-bar mu mu-bar +X) at the CERN LHC are investigated in the
minimal supersymmetric model. The complete physics background from the
production of b b-bar mu mu-bar, b b-bar W^+ W^- (including t t-bar) and jj mu
mu-bar, j = g, u, d, s, c in the Standard Model is calculated with realistic
acceptance cuts. This discovery mode has a simple production mechanism from gg
--> b b-bar phi^0 with its cross section proportional to 1/cos^2(beta) and
could provide an opportunity to measure tan(beta) and the b b-bar phi^0
couplings. In addition, we compare the associated discovery mode above with the
inclusive discovery channel pp --> phi^0 --> mu mu-bar +X. Promising results
are found for the CP-odd pseudoscalar (A^0) and the heavier CP-even scalar
(H^0) Higgs bosons for tan(beta) equivalent to v_2/v_1 >~ 14 and m_A,m_H <~ 325
GeV.Comment: 12 pages, REVTeX, 4 Figure
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