During the past decade physicists around the world have recognized that B mesons
provide the best opportunity to study a fundamental difference between matter and antimatter known as CP violation.
are expected to move unchanged over many successive stars.
5), Skwarnicki and others at the Large Hadron Collider sifted through more than 25,000 meson
decays and found overwhelming evidence for a negatively charged particle with a mass of 4,430 million electron volts.
At the same time the strong repulsion of two nucleons at short distances, understood qualitatively in terms of the Fermi statistics of the quarks in the nucleons and the high energy cost of flipping a quark spin in the nucleon, means that the dynamical mechanism for the weak interaction between nucleons must involve meson
exchange and the soft QCD physics that leads to it.
c](3900) could be a single entity of four quarks, Skwarnicki says, but it could also be a coupling of two mesons
, analogous to two atoms linking up to form a molecule.
, on the other hand, are made of just two - specifically one quark and one antimatter quark.
Measurements show that there are mesons
made of the u, d flavors whose mass is greater than 2000MeV .
Theoretical descriptions of the weak nucleon-nucleon interaction are traditionally based on an effective meson
exchange model in which the coupling constants for parity violating [pi], [rho], and [omega] meson
exchanges set the scale for weak interaction effects and are uncertain to within factors of 2 to 3 on theoretical grounds .
But at the recent meeting physicists from two LHC detectors presented Bs meson
decay sightings consistent with established particle theory.
Thus, the experimental mass difference (in MeV) of the k, [pi] mesons
Papers are presented grouped into the main topics of structure function, vector mesons
, electroweak and beyond the standard model, hadronic final states, heavy flavors, spin physics, and the future of DIS.
In the meson
exchange model of weak nucleon-nucleon (NN) interactions, the exchange of virtual mesons
between the nucleons is parameterized by a set of weak meson