8,437 research outputs found
at hadron colliders
In the first part of the document I describe in a general way the extraction and compare the experimental environments. I then switch to
the available results from the CDF experiment. In the third part I present
early results from the LHCb experiment, which are promising first steps on the
way to a future measurement.Comment: 12 pages, 4 figures, The Ninth International Conference on Flavor
Physics and CP Violation (FPCP 2011) Maale Hachamisha, Israel, May 23--27,
201
Future prospects at LHCb
The LHCb experiment is running at the Large Hadron Collider to study CP
violation and rare decays in the beauty and charm sectors. The motivation and
the strategy of the upgrade envisaged for the long shutdown LS2 (2018) is
presented. The current results for some exemplary physics analyses are given
and the expected performances foreseen for 2018 and for the LHCb Upgrade
project with an integrated luminosity of 50 fb are summarized.Comment: Proceedings of CKM 2012, the 7th International Workshop on the CKM
Unitarity Triangle, University of Cincinnati, USA, 28 September - 2 October
201
Heavy Flavours and CP Violation
Recent results on Heavy Flavours and CP violation are presented. After a
short introduction a taste of K and D results is given. In a third part results
on Vtd and Vts are summaryzed including BBbar mixing results and Bd radiative
decays. A summary of Vcb and Vub measurements is presented in the fourth part.
In the next section CP violation measurements in the Bd sector are shown.
Finally in the last part the overall status of the determination of the CKM
matrix is presented both in the context of the Standard Model and in the
context of New Physics.Comment: Plenary talk at HEP200
Overall determination of the CKM matrix
We discuss the problem of theoretical uncertainties in the combination of
observables related to the CKM matrix elements and propose a statistically
sensible method for combining them. The overall fit is performed on present
data, and constraints on the matrix elements are presented as well as on
fB*sqrt(Bb). We then explore the implications of recent measurements and
developments: jpsi-KS CP asymmetry, epsilon_prime/epsilon and B -> K pi
branching fractions. Finally, we extract from the overall fit the Standard
Model expectations for the rare kaon decays K -> pi nu anti-nu.Comment: Talk given at Heavy Flavours 8, Southampton, UK, 199
Feasibility study for a model independent measurement of 2 in decays using final states
In this paper we present a feasibility study for measuring the combination of
the Unitarity Triangle angle 2 with a time dependent Dalitz
analysis in decays using final states following the
method proposed in [1]. For this study we build a model for this decay using
the latest experimental information and we investigate the possibility of
fitting together with 2 all the relevant strong amplitudes and
phases of the decay model.
[1] R. Aleksan, T.C. Petersen and A. Soffer, Phys. Rev. D67 (2003) 096002
[hep-ph/0209194].Comment: 14 page
Physics results from BABAR and prospects
The BABAR experiment has been taking data since about one year. Physics
results, complementary to those described by G.Sciolla elsewhere in these
Proceedings, are presented: various measurements of the neutral and charged B
mesons lifetimes, the B^0 mixing frequency, the mistag fractions, and the B -->
D_s^(*) X and B^0 --> D_s^(*)+ D^* branching ratios. Some prospects for the
close future are shown. All the numbers given here are preliminary.Comment: 12 pages, 12 postscript figures, contributed proceedings of the
International Conference On CP Violation Physics, 9/18-22/2000, Ferrara,
Ital
Search for new physics at LHCb: rare decays of B hadrons and CP violation in the charm sector
PoS(EPS-HEP 2009) 186 - On behalf of the LHCb collaborationInternational audienceLHCb is an heavy flavour precision experiment with LHC at CERN. It will search for New Physics in CP violation and rare decays in the heavy quarks sector. The experiment is ready to take data for the soon expected start-up of the LHC. An overview of its physics program in both the rare decays of B hadrons and CP violation in the charm sectors is given, illustrated by few key examples: measurements of the \bstomumu\ and \btokstmumu\ decay modes, study of the photon helicity using the \bstophig\ and \btokstee\ decay modes, as well as search for CP violation using D^0 meson
Renormalization of heavy-light currents in moving NRQCD
Heavy-light decays such as , and can be used to constrain the parameters of the Standard
Model and in indirect searches for new physics. While the precision of
experimental results has improved over the last years this has still to be
matched by equally precise theoretical predictions. The calculation of
heavy-light form factors is currently carried out in lattice QCD. Due to its
small Compton wavelength we discretize the heavy quark in an effective
non-relativistic theory. By formulating the theory in a moving frame of
reference discretization errors in the final state are reduced at large recoil.
Over the last years the formalism has been improved and tested extensively.
Systematic uncertainties are reduced by renormalizing the m(oving)NRQCD action
and heavy-light decay operators. The theory differs from QCD only for large
loop momenta at the order of the lattice cutoff and the calculation can be
carried out in perturbation theory as an expansion in the strong coupling
constant. In this paper we calculate the one loop corrections to the
heavy-light vector and tensor operator. Due to the complexity of the action the
generation of lattice Feynman rules is automated and loop integrals are solved
by the adaptive Monte Carlo integrator VEGAS. We discuss the infrared and
ultraviolet divergences in the loop integrals both in the continuum and on the
lattice. The light quarks are discretized in the ASQTad and highly improved
staggered quark (HISQ) action; the formalism is easily extended to other quark
actions.Comment: 24 pages, 11 figures. Published in Phys. Rev. D. Corrected a typo in
eqn. (51
Rare Decays and CP Violation in the System
CP violating phenomena and rare decays of mesons offer interesting
probes to test the quark-flavor sector of the Standard Model. In view of plenty
of data reported in particular from the Large Hadron Collider, this topic has
received a lot of attention in 2012. We give an overview of the the most recent
experimental results, new theoretical developments, and discuss the prospects
for the future exploration of the -meson system.Comment: 40 pages, 10 figures, Invited contribution to Annual Review of
Nuclear and Particle Science, Vol. 63 (2013
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