7,578 research outputs found
On b- and tau-multiplicities per event in SUSY (mSUGRA) and instrumental implications
We investigate the probability to find a b or tau in SUSY production with the
mSUGRA model. We find that in the entire parameter space the probability per
event to find a b-jet of E_T^b > 50 GeV within CMS acceptance (eta < 2.4) is
significant for all tan(beta), varying from a 10 % level to 90 % depending on
the m_0, m_1/2 region. The probabilities per event to find a tau with the same
kinematical cuts is also significant and it increases sharply with tan(beta).
These findings point to the central role a microvertex device would play in
case that SUSY (mSUGRA) is indeed realized in nature and found at the LHC.
First investigations done in the context of the more general MSSM scenario
confirm the findings based on mSUGRA.Comment: 19 pages, 13 figures, 3 table
Observability of MSSM Higgs bosons via sparticle decay modes in CMS
We discuss the possibilities to observe the decays of heavy SUSY Higgs bosons
into supersymmetric particles at the LHC. Such an observation would be of
interest either in a discovery search if sparticle modes are the dominant ones,
or in a study of additional decay modes, bringing information on the SUSY
scenario potentially at work. We will focus on the most promising channel where
the heavy neutral Higgses decay into a pair of next-to-lightest neutralinos,
followed by their decay into two leptons and the LSP, thus leading to four
isolated leptons + missing E_T as the main final state signature. A study with
the CMS detector shows that the background (SM + SUSY) can be sufficiently
suppressed and that in the mass region between m_A = 230 and 450 GeV, for low
and intermediate values of tan beta, the signal would be visible provided
neutralinos and sleptons are light enough.Comment: 14 pages, 20 figure
Searching for Higgs Bosons in Association with Top Quark Pairs in the H -> bb Decay Mode
Search for the Higgs Boson is one of the prime goals of the LHC. Higgs bosons
lighter than 130 GeV decay mainly to a b-quark pair. While the detection of a
directly produced Higgs boson in the bb channel is impossible because of the
huge QCD background, the channel ttH -> lnqqbbbb is very promising in the
Standard Model and the MSSM.
We discuss an event reconstruction and selection method based on likelihood
functions. The CMS detector response is performed with parametrisations
obtained from detailed simulations. Various physics and detector performance
scenarios are investigated and the results are presented. It turns out that
excellent b-tagging performance and good mass resolution are essential for this
channel.Comment: 10 pages, 6 figure
Prospects for Higgs Boson Searches in the Channel WH -> lnbb
We present a method how to detect the WH -> lnbb in the high luminosity LHC
environment with the CMS detector. This study is performed with fast detector
response simulation including high luminosity event pile up. The main aspects
of reconstruction are pile up jet rejection, identification of b-jets and
improvement of Higgs mass resolution.
The detection potential in the SM for m(H) < 130 GeV and in the MSSM is only
encouraging for high integrated luminosity. Nevertheless it is possible to
extract important Higgs parameters which are useful to elucidate the nature of
the Higgs sector. In combination with other channels, this channel provides
valuable information on Higgs boson couplings.Comment: 8 pages, 8 figure
The CMS detector and physics at the LHC
We discuss the physics issues at the LHC, the CMS detector, one of the two general purpose detectors planned at the LHC, and the expected physics performance of LHC detectors in the search for SM and SUSY Higgs bosons, some SUSY particle searches and some possibilities in B and heavy ion physics
Renal nerve denervation reduces blood pressure in resistant hypertension: the role of full four quadrant ablation technique and number of ablations
Renal nerve denervation reduces blood pressure in resistant hypertension: the role of full four quadrant ablation technique and number of ablation
Speech therapy in relation to buco maxillofacial surgery : bibliographic review
La actuaciĂłn fonoaudiolĂłgica en relaciĂłn a las cirugĂas
buco maxilofacial, (disformosis mĂĄxilomandibulares, asimetrĂas
faciales, traumatismos, ATM, quistes o tumores,
etc.) se encuentra muy poco difundida a pesar de que
cuenta con un amplio campo de acciĂłn. El presente trabajo
tiene como objetivo destacar el trabajo fonoaudiolĂłgico
en relaciĂłn directa con la cirugĂa buco maxilofacial,
los tiempos de intervenciĂłn, los modos de abordaje y los
beneficios que esta labor brinda al paciente colaborando
con su accionar al Ă©xito del tratamiento ortodĂłncico-quirĂșrgico.
Se realizĂł una bĂșsqueda exhaustiva en bases de datos
internacionales y se obtuvieron numerosas referencias en
relaciĂłn al tema estudiado, siendo la mayorĂa publicadas
a partir de la década del 90, no pudiendo encontrar publicaciones
nacionales especĂficas.Speech therapy action in relation to the buco maxillofacial
surgery (maxillomandibular disformosis, facial asymmetry,
trauma, TMJ, cysts or tumors, etc.) is not well
known even though it has a broad field of action. This paper
aims to highlight the work of speech therapy directly
related to the buco maxillofacial surgery, intervention
times, modes of approach and the benefits it provides to
the patient by collaborating with its actions in order to
succeed in the orthodontic-surgical treatment.
An exhaustive search was conducted in international databases
and numerous references were obtained in relation
to the subject studied - the majority published from
the 90s, being unable to find specific national publications.Fil: Denegri, MarĂa Alicia.
Universidad Nacional de Cuyo. Facultad de OdontologĂ
Spatial mapping of splicing factor complexes involved in exon and intron definition
We have analyzed the interaction between serine/arginine-rich (SR) proteins and splicing components that recognize either the 5âČ or 3âČ splice site. Previously, these interactions have been extensively characterized biochemically and are critical for both intron and exon definition. We use fluorescence resonance energy transfer (FRET) microscopy to identify interactions of individual SR proteins with the U1 small nuclear ribonucleoprotein (snRNP)âassociated 70-kD protein (U1 70K) and with the small subunit of the U2 snRNP auxiliary factor (U2AF35) in live-cell nuclei. We find that these interactions occur in the presence of RNA polymerase II inhibitors, demonstrating that they are not exclusively cotranscriptional. Using FRET imaging by means of fluorescence lifetime imaging microscopy (FLIM), we map these interactions to specific sites in the nucleus. The FLIM data also reveal a previously unknown interaction between HCC1, a factor related to U2AF65, with both subunits of U2AF. Spatial mapping using FLIM-FRET reveals differences in splicing factors interactions within complexes located in separate subnuclear domains
- âŠ