نتایج جستجو برای: روش charm
تعداد نتایج: 374417 فیلتر نتایج به سال:
Charm quarks are produced copiously in deep inelastic scattering (DIS) at HERA. At sufficiently high photon virtualities, Q, the production of charm quarks constitutes up to 30% of the total cross section [1,2]. Previous measurements of D∗ cross sections [1,2,3,4] indicate that the production of charm quarks in DIS in the range 1 < Q < 600 GeV is consistent with QCD calculations in which charm ...
The ALICE experiment is devoted to the study of heavy-ion collisions at the CERN LHC collider. We present the results of a feasibility study for the detection of D → Kπ decays in Pb–Pb collisions with ALICE. 1 Physics motivation The aim of the ALICE [1] experiment is to study the behaviour of nuclear matter in the conditions of high densities and temperatures in which a transition to a deconfin...
Charm physics plays a unique dual role in the modern investigations of flavor physics. Charm decay and production experiments provide valuable checks and supporting measurements for studies of CP-violation in measurements of CKM parameters in b-physics, as well as outstanding opportunities for searches for new physics. Historically, many methods of heavy quark physics have been first tested in ...
Almost since the discovery of charm mesons, mixing of D −D 0 mesons have been sought in analogy to the well-known K−K 0 mixing. Due to very effective GIM suppression, the expected mixing rate in the charm system is much smaller than for kaons. Only very recently, the BaBar [1] and Belle [2] collaborations have reported the first evidence of charm mixing. These results have renewed the interest ...
We report measurements of the charm-anticharm production asymmetries for Λc , Σ c , Σ 0 c , Σ ++∗ c , Σ 0∗ c , and Λ + c (2625) baryons from the Fermilab photoproduction experiment FOCUS (E831). These asymmetries are integrated over the region where the spectrometer has good acceptance. In addition, we have obtained results for the photoproduction asymmetries of the Λc baryons as functions of p...
Some recent ZEUS results on the photoproduction of open charm and possible implications for photon structure are discussed. 1 Open Charm Photoproduction at HERA Photoproduction of ‘open’ charm (as opposed to cc̄ bound states) can take place via several processes at HERA. The most obvious is photon-gluon fusion. The photon interacts directly with a gluon from the proton via t-channel charm quark,...
We investigate charm production in an equilibrated quark-gluon plasma produced in heavy-ion collisions at RHIC and LHC. Effective quark and gluon masses are introduced from thermal QCD calculations. Assuming a Bjorken-type longitudinal expansion and including the influence of temperature dependent masses on the expansion, we determine the total number of cc pairs produced in the quarkgluon plas...
The status of charm and beauty physics studies at Fermilab is reviewed. Data from fixed target experiments on charm production, semi-leptonic decay, and Cabibbo suppressed decays as well as charmonium studies in antiproton annihilation are described. In addition beauty results from CDF and E653 are reviewed and prospects for studies of B physics at collider detectors are discussed. Hadronic pro...
The processes of open and hidden charm production in NN collisions and of open charm production in γN collisions are studied. The near-threshold cross section is predicted and polarization phenomena are calculated in frame of an effective Lagrangian approach.
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید