3,328 research outputs found
On the uniqueness of D=11 interactions among a graviton, a massless gravitino and a three-form. III: Graviton and gravitini
Under the hypotheses of smoothness of the interactions in the coupling
constant, locality, Poincare invariance, Lorentz covariance, and the
preservation of the number of derivatives on each field in the Lagrangian of
the interacting theory (the same number of derivatives like in the free
Lagrangian), we prove that in D=11 there are no cross-interactions between the
graviton and the massless gravitino and also no self-interactions in the
Rarita-Schwinger sector. A comparison with the case D=4 is briefly discussed.Comment: 16 page
On the uniqueness of D=11 interactions among a graviton, a massless gravitino and a three-form. IV: Putting things together
Under the hypotheses of smoothness of the interactions in the coupling
constant, locality, Poincare invariance, Lorentz covariance, and the
preservation of the number of derivatives on each field in the Lagrangian of
the interacting theory (the same number of derivatives like in the free
Lagrangian), we prove that the only consistent interactions in D=11 among
massless gravitini, a graviton, and a 3-form are described by N=1, D=11 SUGRA.Comment: 45 page
Calcium phospates in the bat guano deposit from peĹźtera Mare de la MereĹźti, PerĹźani mountains, Romania
Weyl group multiple Dirichlet series constructed from quadratic characters
We construct multiple Dirichlet series in several complex variables whose
coefficients involve quadratic residue symbols. The series are shown to have an
analytic continuation and satisfy a certain group of functional equations.
These are the first examples of an infinite collection of unstable Weyl group
multiple Dirichlet series in greater than two variables.Comment: incorporated referee's comment
High P_T Leptons and W Production at HERA
Details are given of the observation by H1 of events containing high P_T
leptons in addition to large missing P_T. A closely related ZEUS analysis,
including a preliminary measurement of the W production cross section, is
discussed and the two experiments are compared. Some possible non-Standard
Model sources for the events are considered.Comment: 9 pages, 6 figures, LaTeX, uses iop style files and axodraw.sty. To
appear in the proceedings of the 3rd UK Phenomenology Workshop on HERA
Physics, September 1998, Durham (J.Phys.G: Nucl.Part.Phys.
HERA Physics Beyond the Standard Model
The prospects of physics beyond the standard model in deep inelastic
scattering are reviewed, emphasizing some scenarios which attained attention
after the observation of an excess of events with large momentum transfer at
HERA.Comment: 8 pages, LaTeX, uses iop style files and axodraw.sty, Talk presented
at the 3rd UK Phenomenology Workshop on HERA Physics, September 1998, Durha
Study of Higgs boson production and its b-bbar decay in gamma-gamma processes in proton-nucleus collisions at the LHC
We explore for the first time the possibilities to measure an
intermediate-mass (mH = 115-140 GeV/c^2) Standard-Model Higgs boson in
electromagnetic proton-lead (pPb) interactions at the CERN Large Hadron
Collider (LHC) via its b-bbar decay. Using equivalent Weizsaecker-Williams
photon fluxes and Higgs effective field theory for the coupling gamma-gamma -->
H, we obtain a leading-order cross section of the order of 0.3 pb for exclusive
Higgs production in elastic (pPb --> gamma-gamma --> p H Pb) and semielastic
(pPb --> gamma-gamma --> Pb H X) processes at sqrt(s) = 8.8 TeV. After applying
various kinematics cuts to remove the main backgrounds (gamma-gamma --> b-bbar
and misidentified gamma-gamma-->q-qbar events), we find that a Higgs boson with
mH = 120 GeV/c^2 could be observed in the b-bbar channel with a
3sigma-significance integrating 300 pb^-1 with an upgraded pA luminosity of
10^31 cm^-2s^-1. We also provide for the first time semielastic Higgs cross
sections, along with elastic t-tbar cross sections, for electromagnetic pp, pA
and AA collisions at the LHC.Comment: 22 pages, 8 figures. Tiny changes. Version as publishe
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