The Fact Site
In this article I investigated some of the mid-level and developing automobile websites from US and derived their Search Engine Optimization (SEO) indices and trends. Like the protons that the LHC accelerates, the new particles are baryons made from three quarks bound together by the strong force The types of quarks are different, however: the new Ξb particles both contain one beauty (b), one strange (s), and one down (d) quark.
The interest in these four states is also that they are the only known exotic candidates which do not contain u and d quarks, which are the lightest http://apratamaa.mhs.uksw.edu/ quarks and those which human beings and the matter around us are made of. As such, they may be more tightly bound than other exotic particles.
This allowed the LHCb detector, recording the particles only on one side of the interaction point, to make measurements in the case of the proton beam pointing towards the LHCb detector as well as in the opposite case of the lead beam pointing to it.
The observation of the similar near-side ridge correlations in proton-proton collisions by the CMS collaboration and in proton-lead collisions by the LHC experiments came as surprise since the formation of quark-gluon plasma was a priori not expected in these collisions.
The LHCb collaboration has submitted a paper based on run 1 data which reports the measurement of a fundamental parameter of the Standard Model (SM), the electroweak mixing angle, θW. This parameter quantifies the relative strengths of electromagnetism and the weak force.
This represents the first observation of CP violation in charm particle decays, opening up a new field in particle physics: the study of CP-violating effects in the sector of up-type quarks, and searches for new physics effects using charm CP asymmetry measurements.
LHCb has already performed the world's most precise measurements of γ, one of the other triangle angles, see 11 September 2014 news , and the mixing frequency of Bs mesons, see 7 November 2012 news , which is an essential ingredient for the determination of the side opposite to the angle γ.
It is interesting to note that certain combinations of MSSM parameters allow lower BR values than those predicted by the SM. The LHCb measurements of the parameter φs, which sets the scale for the difference between properties of matter and antimatter for the strange beauty Bs mesons, see 5 March 2012 news, also strongly limits the SUSY parameter space that is still allowed, as shown by the vertical lines on the right image below.
The average of all (world) results is brought, by including this new measurement, a little bit closer to the SM prediction and at the same time, due to improved precision, the discrepancy between the experimental world average and the SM prediction increases slightly to about 3.4 standard deviations.
The LHCb Collaboration has just presented at the 2013 European Physical Society Conference on High Energy Physics, EPSHEP , Stockholm, Sweden, a first significant non-zero measurement of an observable proportional to the photon polarisation in b→sγ transition.
Therefore the 14 November 2011 announcement by the LHCb Collaboration of 3.5σ evidence of CP violation in charm sector, ΔACP = (-0.82 ± 0.21 ± 0.11)%, triggered intensive theoretical activity with conclusions that some special Standard Model effects could generate CP violation effects even as big as about 1%. This interesting LHCb result was later confirmed by the CDF and Belle collaborations.
The Bs0 and B0 meson decays into a muon pair have long been regarded among the most promising class of measurements where these new effects could show up. Previous LHCb results already severely constrained the type of SM-extension models that are still allowed, as described in the 30 March 2012 news.