100 research outputs found
Higgs plus jet production in bottom quark annihilation at next-to-leading order
The cross section for Higgs+jet production in bottom quark annihilation is
calculated through NLO QCD. The five-flavour scheme is used to derive this
contribution to the Higgs+jet production cross section which becomes
numerically important in the MSSM for large values of tan(beta). We present
numerical results for a proton collider with 14 TeV center-of-mass energy. The
NLO matrix elements for d(sigma)/d(pT) are then combined with the total
inclusive cross section in order to derive the integrated cross section with a
maximum cut on pT at next-to-next-to-leading order.Comment: 11 pages, 7 figure
Indirect bounds on heavy scalar masses of the two-Higgs-doublet model in light of recent Higgs boson searches
We study an upper bound on masses of additional scalar bosons from the
electroweak precision data and theoretical constraints such as perturbative
unitarity and vacuum stability in the two Higgs doublet model taking account of
recent Higgs boson search results. If the mass of the Standard-Model-like Higgs
boson is rather heavy and is outside the allowed region by the electroweak
precision data, such a discrepancy should be compensated by contributions from
the additional scalar bosons. We show the upper bound on masses of the
additional scalar bosons to be about 2 TeV for the mass of the
Standard-Model-like Higgs boson to be 240 GeV.Comment: 11 pages, 5 eps file
Jet-veto in bottom-quark induced Higgs production at next-to-next-to-leading order
We present results for associated Higgs+n-jet production in bottom quark
annihilation, for n=0 and n>=1 at NNLO and NLO accuracy, respectively. We
consider both the cases with and without b-tagging. Numerical results are
presented for parameters relevant for experiments at the LHC.Comment: 27 pages, 13 figures, 8 table
Production of the neutral top-pion in association with a high- jet at the
In the framework of the topcolor-assisted technicolor model, we study
production of the neutral top-pion in association with a
high- jet at the , which proceeds via the partonic processes
, ,
, , and . We find
that it is very challenging to detect the neutral top-pion via
the process , while the
possible signatures of might be detected via the process
at the .Comment: 13 pages, 4 figures; typos correcte
Analytic Results for Higgs Production in Bottom Fusion
We evaluate analytically the cross section for Higgs production plus one jet
through bottom quark fusion. By considering the small pT limit we derive
expressions for the resummation coefficients governing the structure of large
logarithms, and compare these expressions with those available in the
literature.Comment: 14 pages, 7 figure
Evaluatie Politiewet 2012 in de Eenheid Oost-Nederland en landelijke thema's
At the request of the commission ‘Evaluatie Politiewet 2012’, the Rotterdam School of Management, Erasmus University, conducted an evaluation of the functioning of the Police Unit East-Netherlands (Eenheid Oost-Nederland). In addition, the nationally relevant themes with respect to ‘the role of the corps chef’, ‘the use of the right to appoint’, and the ‘construction of the police force as a separate legal entity’ were included in the evaluation at the request of the minister of Security and Justice of the Netherlands.
The goal of the evaluation is to gain insights into the consequences of the implementation of the national police for the Unit East-Netherlands. The main question of th
Scalar and Pseudoscalar Higgs Boson Plus One Jet Production at the LHC and Tevatron
The production of the Standard Model (SM) Higgs boson (H) in association with
a jet is compared with that of the lightest scalar Higgs boson (h^0) and the
pseudoscalar Higgs boson (A^0) of the Minimal Supersymmetric Model (MSSM) at
both the CERN Large Hadron Collider (LHC) and the Fermilab Tevatron. We include
both top and bottom quark loops to lowest order in QCD and investigate the
limits of zero quark mass and infinite quark mass.Comment: 14 pages, REVTeX4, 14 eps figures v2: Version accepted for
publication in PR
Inadequacy of zero-width approximation for a light Higgs boson signal
In the Higgs search at the LHC, a light Higgs boson (115 GeV <~ M_H <~ 130
GeV) is not excluded by experimental data. In this mass range, the width of the
Standard Model Higgs boson is more than four orders of magnitude smaller than
its mass. The zero-width approximation is hence expected to be an excellent
approximation. We show that this is not always the case. The inclusion of
off-shell contributions is essential to obtain an accurate Higgs signal
normalisation at the 1% precision level. For gg (-> H) -> VV, V= W,Z, O(10%)
corrections occur due to an enhanced Higgs signal in the region M_VV > 2 M_V,
where also sizable Higgs-continuum interference occurs. We discuss how
experimental selection cuts can be used to exclude this region in search
channels where the Higgs invariant mass cannot be reconstructed. We note that
the H -> VV decay modes in weak boson fusion are similarly affected.Comment: 26 pages, 18 figures, 6 tables; added references, expanded
introduction, version to appear in JHE
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