471 research outputs found
Higgs Boson Production in Association with a Photon in Vector Boson Fusion at the LHC
Higgs boson production in association with two forward jets and a central
photon at the CERN Large Hadron Collider is analyzed, for the Higgs boson
decaying into a b bbar pair in the m_H <= 140 GeV mass region. We study both
irreducible and main reducible backgrounds at parton level. Compared to the
Higgs production via vector-boson fusion, the request of a further photon at
moderate rapidities dramatically enhances the signal/background ratio.
Inclusive cross sections for p_T^\gamma >= 20 GeV can reach a few tens of fb's.
After a suitable choice of kinematical cuts, the cross-section ratio for signal
and irreducible-background can be enhanced up to >= ~1/10, with a signal cross
section of the order of a few fb's, for m_H ~ 120 GeV. The request of a central
photon radiation also enhances the relative signal sensitivity to the WWH
coupling with respect to the ZZH coupling. Hence, a determination of the cross
section for the associated production of a Higgs boson decaying into a b bbar
pair plus a central photon in vector-boson fusion could help in constraining
the b bbar H coupling, and the WWH coupling as well. A preliminary study of QCD
showering effects points to a further significant improvement of the signal
detectability over the background.Comment: 30 pages, 8 figures, 8 tables; minor corrections to the text; version
appeared in Nuclear Physics
Six-year transition from conventional to organic farming: effects oncrop production and soil quality
Soil Olsen P response to different phosphorus fertilisation strategies in long‐term experiments in NW Italy
In vitro testing for genotoxicity of indigo naturalis assessed by micronucleus test.
In the field of cosmetic dyes, used for coloring the hair and skin, there is a clear tendency to replace the widely used synthetic dyes by natural colorants, such as henna and mixtures of henna with indigo. The aim of this study was to estimate the genotoxicity of water and DMSO solutions of indigo naturalis (prepared from Indigofera tinctoria leaves) using the cytokinesis-blocked micronucleus (CBMN) assay in the human metabolically active HepG2 cell line. The cytotoxic effects of indigo solutions were first assessed by propidium iodide and fluorescein-diacetate simultaneous staining. For both solutions, cytotoxicity was always under 10%. Data obtained in the CBMN assay (for all concentrations tested) indicated that the frequency of MN (micronuclei) in exposed cells was no higher than the control. Both the water and DMSO solutions showed the same behavior. These results indicate that indigo naturalis exhibits neither cytotoxicity, nor genotoxicity for all concentrations tested, which may justify excluding indigofera and its components from the list of carcinogenic agents
Concerns about being a health consumer representatives: results of a South Australian study on consumer perspectives
Behavioural health issues in post coronavirus disease (COVID) syndrome and suicide risk: a narrative review
A participative rice farmer project for the adoption of weed management practices helps to increase environmental and naturalistic value of rice production
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