Charm Physics at CDF II. PDF Download
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Languages : en
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The CDF II detector has the capability of triggering on displaced tracks. Because of this ability, CDF II has accrued large samples of charged meson decays to fully hadronic final states in 64 pb[sup -1] of p[bar p] collision data gathered at[radical]s= 1.96 TeV. Using initial Run II data samples, the production cross sections for J/[psi], D[sup 0], D[sup+], D*[sup+] and D[sub s][sup+] mesons have been measured. Ratios of branching ratios for Cabibbo suppressed final states and CP asymmetries in D[sup 0] meson decays have been studied. A measurement of the mass difference m(D[sub s][sup+]) -m(D[sup+]) has been done, and a limit for the branching fraction of the FCNC D[sup 0][yields][mu][sup+][mu][sup -] decays has been set.
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Languages : en
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Book Description
The CDF II detector has the capability of triggering on displaced tracks. Because of this ability, CDF II has accrued large samples of charged meson decays to fully hadronic final states in 64 pb[sup -1] of p[bar p] collision data gathered at[radical]s= 1.96 TeV. Using initial Run II data samples, the production cross sections for J/[psi], D[sup 0], D[sup+], D*[sup+] and D[sub s][sup+] mesons have been measured. Ratios of branching ratios for Cabibbo suppressed final states and CP asymmetries in D[sup 0] meson decays have been studied. A measurement of the mass difference m(D[sub s][sup+]) -m(D[sup+]) has been done, and a limit for the branching fraction of the FCNC D[sup 0][yields][mu][sup+][mu][sup -] decays has been set.
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Languages : en
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Using the data samples collected with the CDF Run II detector during the year 2002 and early 2003, new measurements of the production cross-sections and the masses, lifetimes and branching fractions of beauty and charm hadrons are presented. New measurements of the [Lambda]{sub b} mass, lifetime, and branching fractions have greatly improved the current knowledge of bottom baryon properties and decay dynamics. the large charm signals made available by the silicon vertex track trigger have enabled the establishment of key measurements using rare charm decays that are sensitive to new physics beyond the Standard Model. The decay signals B{sub s} → D{sub s}[pi] and the two body charmless decays of B° and B{sub s} have been established. These decay channels are important milestones towards the measurement of B{sub s} mixing and direct CP violation in the B system.
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Category : Water
Languages : en
Pages : 79
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Languages : en
Pages : 6
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After many upgrades to the CDF detector and to the accelerator complex, Run II began in April 2001. The new detector has improved capabilities for charm physics, and first results from the analysis of early Tevatron Run II data are reported here.
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Languages : en
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Among CDF physics opportunities, heavy flavour physics is one of the most prominent and promising for the Tevatron run2. Still in the run1 CDF demonstrated that high precision CP violation measurement in the beauty sector as well as B mixing are feasible at hadronic collider, we think here especially to the first measure of sin2[beta] with B[sup 0][yields] J/PsiK[sub s][sup 0] decays and that of[Delta]m[sub Bd]. Tevatron accelerator and CDF detector upgrades are extensively discussed in other papers to which we refer to. Here we just recall the new features relevant to heavy flavour physics: New muon detector coverage up to[eta]
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Languages : en
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The cross section of p[bar p] into charm is very high compared to e[sup+]e[sup -]-machines, but it is orders of magnitude smaller than the total cross section of[approx] 100mb. This explains the need for a good trigger mechanism. Traditionally charm physics at hadron colliders relies on a lepton signature. For example, the decay of the J[psi] into two leptons or semi-leptonic decays of D-mesons. Both detectors at the Tevatron, CDF and D0 have undergone substantial upgrades for RUN II. CDF now exploits a new trigger technique selecting more abundant hadronic decays. First charm physics results from the CDF and D0 experiments at the Tevatron Run II are presented. With the addition of the Secondary Vertex Trigger CDF has become a competitive charm experiment.
Author: Soon Yung Jun
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Languages : en
Pages : 7
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Hot topics in flavor physics at CDF are reviewed. Selected results of top, beauty, charm physics and exotic states in about 200 pb{sup -1} data collected by the CDF II detector in p{bar p} collisions at {radical}s = 1.96 TeV at the Fermilab Tevatron are presented.
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Category :
Languages : en
Pages : 7
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We report a search for non-Standard Model physics through the measurement of CP-violating asymmetry in the Cabibbo suppressed D° →??− and D° → K+K− decays reconstructed in about 5.94 fb−1 of CDF data. We use the strong D*+ → D°?+ decay (D* tag) to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c{bar c} pair-production in p{bar p} collisions. Large samples of Cabibbo favored D° → K−?+ decays with and without D* tag are used to highly suppress systematic uncertainties due to detector effects. The results are the world's most precise measurements to date.
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Category :
Languages : en
Pages : 6
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Author:
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Languages : en
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The CDF experiment has performed several measurements in the area of beauty and charm physics with the data collected during the Run I of the Tevatron. The experiment is now ready to collect new data at higher luminosity with a substantially improved detector. We discuss these improvements and the future measurements in this area of physics accessible after the first few years of data taking. These include the measurement of the mixing frequency of B{sub s} mesons and that of CP violation effects in the B0 sector.
