6,212 research outputs found
Search for Standard Higgs Boson at Supercolliders
We review the standard Higgs boson physics and the search for higgs boson at
LEP and LHC supercollidersComment: latex, 70 pages, 15 ps.figure
Search for new physics at LHC
We review the search for new physics to be performed at the Large Hadron
Collider(LHC). Namely, we review the expectations for the Higgs boson,
supersymmetry and exotica detection at LHC. We also describe the main
parameters of the CMS and ATLAS detectors.Comment: 93 pages, 31 figures, added reference
Higgs mechanism as a collective effect due to extra dimension
A systematic analysis of the unitary electroweak model described by the
higher derivative Lagrangian depending on extra dimension [1] is presented.Comment: 11 pages, no figure
Proton decay matrix elements with domain-wall fermions
Hadronic matrix elements of operators relevant to nucleon decay in grand
unified theories are calculated numerically using lattice QCD. In this context,
the domain-wall fermion formulation, combined with non-perturbative
renormalization, is used for the first time. These techniques bring reduction
of a large fraction of the systematic error from the finite lattice spacing.
Our main effort is devoted to a calculation performed in the quenched
approximation, where the direct calculation of the nucleon to pseudoscalar
matrix elements, as well as the indirect estimate of them from the nucleon to
vacuum matrix elements, are performed. First results, using two flavors of
dynamical domain-wall quarks for the nucleon to vacuum matrix elements are also
presented to address the systematic error of quenching, which appears to be
small compared to the other errors. Our results suggest that the representative
value for the low energy constants from the nucleon to vacuum matrix elements
are given as |alpha| simeq |beta| simeq 0.01 GeV^3. For a more reliable
estimate of the physical low energy matrix elements, it is better to use the
relevant form factors calculated in the direct method. The direct method tends
to give smaller value of the form factors, compared to the indirect one, thus
enhancing the proton life-time; indeed for the pi^0 final state the difference
between the two methods is quite appreciable.Comment: 56 pages, 17 figures, a comment and two references added in the
introduction, typo corrected in Eq.1
The time travel paradox
We define the time travel paradox in physical terms and prove its existence
by constructing an explicit example. We argue further that in theories -- such
as general relativity -- where the spacetime geometry is subject to nothing but
differential equations and initial data no paradoxes arise.Comment: Minor changes + an explanatory note concerning the lions with the
same world line
Hyperfast Interstellar Travel in General Relativity
The problem is discussed of whether a traveller can reach a remote object and
return back sooner than a photon would when taken into account that the
traveller can partly control the geometry of his world. It is argued that under
some reasonable assumptions in globally hyperbolic spacetimes the traveller
cannot hasten reaching the destination. Nevertheless, it is perhaps possible
for him to make an arbitrarily long round-trip within an arbitrarily short
(from the point of view of a terrestrial observer) time.Comment: The final version, close to (but better than) what will be published
in Phys. Rev. D. The explanatory part is made more detaile
On the Confidence Interval for the parameter of Poisson Distribution
The possibility of construction of continuous analogue of Poisson
distribution with the search of bounds of confidence intervals for parameter of
Poisson distribution is discussed. Also, in the article is shown that the true
value of a parameter of Poisson distribution for the observed value
has Gamma distribution with the scale parameter, which is equal to one, and the
shape parameter, which is equal to . The results of numerical
construction of confidence intervals are presented.Comment: 12 pages (1 LaTeX file), 3 eps files (figures), references to
Sections are correcte
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