1,722,047 research outputs found
NEW RESULTS FOR HEAVY FLAVOR AND QCD TESTS AT THE TEVATRON
No full textThe latest results for QCD and Heavy flavor at the Tevatron are
summarized. The most recent results on Jet physics are discussed in the
light of searching for new physics and to study the contribution of soft
interactions to the hard process. The production of c and b-hadrons and
the their decay properties can be precisely measured at the Tevatron.
Lifetimes, branching fractions and CP asymmetries for several decay
modes are discussed. In particular the prospects for B-S mixing at the
Tevatron are presented
Results from the Tevatron: CDF and D0
No full textCDF and DO experiments have been taking data at the Tevatron collider at Fermilab since 2002. Many important physics results have been achieved during these years, going from the discovery of the top quark to the precise measurement of the oscillation frequency of the Bg mesons. The very high luminosity reached recently by the Tevatron machine allows the experiments to search for very rare processes, like Higgs boson production, and in general any new physics process. The results described in this paper have as guiding thread the new physics search in several different fields going from quantum cromodynamics to supersymmetric extension of Standard Model, getting through B-meson physic
Bs Mixing at the Tevatron
No full textThe measurement of the Bsmixing oscillation frequency, Δms, has been the main goal for both experiments CDF and D0 which are running at the Tevatron collider. With 1 fb−1 of data collected during the last four years
D0 set a lower and upper limit on this frequency, 17 < Δms < 21 ps−1. CDF measured Δms with a precision better than 2% and the probability that the data could randomly fluctuate to mimic such a signature is 0.2
CDF way to Grid
No full textThe CDFII (Collider Detector at Fermilab II) experiment is taking data since 2001 using a multipurpose detector. Currently about 5 fb(-1) of data has been written to tape and successfully analyzed by physicists using CDF computing infrastructure. The computing architecture has evolved from the initial dedicated farms to using decentralized Grid-based resources on the EGEE Grid, Open Science Grid (OSG) and Fermilab Campus Grid. In order to deliver high quality physics results in a timely manner to a running experiment, CDF had to adapt to Grid with minimum impact on the physicists analyzing the data. The use of portals to access the computing resources has allowed CDF to migrate to Grid computing without changing how the users work. The infrastructure modifications were done by small steps over several years to reach the current stable configuration. The evolution of the architecture and the performances reached by using portals are presented here
Prospects for observing CP violation at the Tevatron
No full textIn the near future measurements of CP violation will be one of the most
crucial tests of the Standard Model. Several B factories are being
constructed to study these phenomena in the B system. CP Violation in B
meson decays may also be studied at the Tevatron Collider by two
experiments: CDF and D0. Starting from data collected during Run I, the
sensitivity expected in Run II is shown
Standard Model high mass Higgs search at CDF
No full textThe CDF collaboration has analyzed almost 6 f b−1 of data collected at the Tevatron Collider at sqrt(s) = 1.96 TeV to search for Standard Model Higgs boson through the decay into W+W−. Starting from events with two leptons, advanced analysis techniques are applied to better discriminate signal from background. The Higgs sensitivity is maximized combining together analysis that exploit different event topologies. No significant excess over the expected background is observed and data is used to set a limit in units of Standard Model expectations. The limit plays a fundamental role in the Higgs search excluding the existence of this particle with mass between 158 and 175 GeV/c2 when combined with D0, the other Tevatron experiment
Standard Model high mass Higgs search at CDF
Full text linkThe CDF collaboration has analyzed almost 6 f b−1 of data collected at the Tevatron Collider at sqrt(s) = 1.96 TeV to search for Standard Model Higgs boson through the decay into W+W−.
Starting from events with two leptons, advanced analysis techniques are applied to better discriminate signal from background. The Higgs sensitivity is maximized combining together analysis that exploit different event topologies. No significant excess over the expected background is
observed and data is used to set a limit in units of Standard Model expectations. The limit plays a fundamental role in the Higgs search excluding the existence of this particle with mass between
158 and 175 GeV/c2 when combined with D0, the other Tevatron experiment
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