Observation ofD0−D¯0Oscillations

Observation ofD0−D¯0Mixing inKo1, Won2, Adachi3 et al. 2014Phys. Rev. Lett.Self Cite

“…Mixing phenomena are well established for K 0 , B 0 , and B 0 s mesons and their mixing rates are consistent with predictions based on the standard model (SM) [3]. D 0 mixing has also recently been observed in hadron collider experiments [4,5], confirming a previous D 0 -D 0 mixing signal [6] based mainly on combined evidence from three different experiments [7][8][9]. The phenomenology of meson mixing is described by two parameters, x ¼ Δm=Γ and y ¼ ΔΓ=2Γ, where Δm and ΔΓ are the mass and width differences between the two PRL 112, 111801 (2014) P H Y S I C A L R E V I E W L E T T E R S week ending 21 MARCH 2014 111801-2 mass eigenstates and Γ is the average decay width of the mass eigenstates.…”

“…(2), the measured proper decay time should be approximately the true proper decay time. This condition is satisfied in hadron collider experiments [4,5] where the tagged D's have a decay time much larger than the resolution ont. At a B factory, however, the mean decay time of the tagged D's, shown in Fig.…”

Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners

“…The radiative decays of X(3872) → γJ/ψ have been observed [78][79][80][81], which implies that the C-parity of X(3872) is positive. Finally, LHCb performed the analysis of the angular correlations in B + → X(3872)K + , X(3872) → π + π − J/ψ, J/ψ → µ + µ − decays and confirmed the eigenvalues of total spin angular momentum, parity and charge conjugation of the X(3872) state are 1 ++ [4,82].…”

“…In this regard, X(3872) is not manifestly exotic, but it shows up with many unusual properties. By now X(3872) has been observed by many experimental facilities, and is well established with its quantum numbers determined by LHCb, J P C = 1 ++ [4]. In the latest PDG data base, more than thirty particles are listed as candidates of exotic hadrons.…”

Overview of the CP violation and mixing in the charm sector

“…By now the mixing of neutral charm mesons D 0 is firmly established. The no-mixing hypothesis has been excluded with a significance more than ten standard deviations form a single experiment [2]. However, there is no experimental evidence for CP violation in the up-type quark sector.…”