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تسجيل مستخدم جديدPhysics Achievements from the Belle Experiment
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The Belle experiment, running at the KEKB e+e- asymmetric energy collider during the first decade of the century, achieved its original objective of measuring precisely differences between particles and anti-particles in the B system. After collecting 1000 fb-1 of data at various Upsilon resonances, Belle also obtained the many other physics results described in this article.
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We report the recent results of a search for the decay B- --> tau- anti-nu_tau, observations of new resonances X, Y and Z, and the first results from Upsilon(5S) data collected with the Belle detector at KEKB e+e- collider.
We present the physics program of the Belle II experiment, located on the intensity frontier SuperKEKB $e^+e^-$ collider. Belle II collected its first collisions in 2018, and is expected to operate for the next decade. It is anticipated to collect 50
/ab of collision data over its lifetime. This book is the outcome of a joint effort of Belle II collaborators and theorists through the Belle II theory interface platform (B2TiP), an effort that commenced in 2014. The aim of B2TiP was to elucidate the potential impacts of the Belle II program, which includes a wide scope of physics topics: B physics, charm, tau, quarkonium, electroweak precision measurements and dark sector searches. It is composed of nine working groups (WGs), which are coordinated by teams of theorist and experimentalists conveners: Semileptonic and leptonic B decays, Radiative and Electroweak penguins, phi_1 and phi_2 (time-dependent CP violation) measurements, phi_3 measurements, Charmless hadronic B decay, Charm, Quarkonium(like), tau and low-multiplicity processes, new physics and global fit analyses. This book highlights golden- and silver-channels, i.e. those that would have the highest potential impact in the field. Theorists scrutinised the role of those measurements and estimated the respective theoretical uncertainties, achievable now as well as prospects for the future. Experimentalists investigated the expected improvements with the large dataset expected from Belle II, taking into account improved performance from the upgraded detector.
The most recent results on top-quark physics reported by the CMS experiment at the Large Hadron Collider (LHC) are presented in this talk. The results are based on a data sample of about 36/pb of data collected during 2010 at a pp center-of-mass energy of 7 TeV.
In this paper we review a selection of recent results obtained, in the area of QCD physics, from the CDF-II experiment that studies $pbar{p}$ collisions at $sqrt{s}$=1.96 TeV provided by the Fermilab Tevatron Collider. All results shown correspond to
analysis performed using the Tevatron Run II data samples. In particular we will illustrate the progress achieved and the status of our studies on the following QCD processes: jet inclusive production, using different jet clustering algorithm, $W(to e u_e)+ $jets and $Z(to e^+ e^-)+ $jets production, $gamma+b-$jet production, dijet production in double pomeron exchange and finally exclusive $e^+e^-$ and $gamma gamma$ production. No deviations from the Standard Model have been observed so far.
We report on the measurement of inclusive charmless semileptonic B decays $B to X_{u} ell u$. The analysis makes use of hadronic tagging and is performed on the full data set of the Belle experiment comprising 772 million $Bbar{B}$ pairs. In the pro
ceedings, the preliminary results of measurements of partial branching fractions and the CKM matrix element $|V_{ub}|$ are presented.
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