120543994
Comment regarding bounds upon heavy meson form factors
We present a counterexample to a recently proposed bound on the Isgur-Wise function. We also discuss which of the assumptions underlying the bound is faulty, and present a physical interpretation of an experimental measurement which would violate the bounds.
119627098
A Derivation of the heavy quark effective Lagrangian from QCD
We show how to derive the heavy quark effective theory from QCD by carrying out the usual steps for the construction of an effective theory. Using functional methods we first integrate out heavy degrees of freedom and then give the expansion of the resulting nonlocal action functional in powers of 1/mQ, mQ being the mass of the heavy quark.
117025439
On the Monopole Model of Form Factors for Heavy Meson Decays
A pole model for the form factors describing heavy to light meson transitions is constructed, and the results compared with the predictions of the heavy quark effective theory (HQET). While most of the HQET-predicted relationships among form factors hold at the maximum value of q{sup 2}, many are violated, suggesting that the simplest version of the pole model of meson form factors should be used with caution, especially when combined with HQET.
56316663
Baryons in the heavy quark effective theory
We show how to incorporate baryons in the heavy quark effective theory. A convenient formalism is exhibited and applied to semileptonic weak decays of heavy baryons. In general, the heavy quark effective theory reduces the number of form factors necessary to describe the matrix elements for transitions among heavy baryons. We also note that in semileptonic weak decays of Δc one arrives at an important and experimentally testable prediction that two form factors suffice to describe this process. As a further application of the formalism we discuss exclusive production of heavy baryons in e+e− annihilation.
123512923
Sequential fragmentation and rate oscillations in exclusive decays
Abstract We consider the decay of heavy quarkonia into two light mesons, and assume that quark-antiquark pairs are created sequentially when the final state is formed. We find quantum oscillations in the decay rate as a function of total energy. These oscillations can explain the energy dependence observed in the πϱ and K ∗ K channels at the J ψ and ψ ′ and predict the behaviour at the heavier Ψ family. In the mechanism we discuss, a given final state is produced only in a narrow range of the possible distances between the initial light quark and light antiquark.
119193204
Strangeness -2 and -3 baryons in a constituent quark model.
We apply a quark model developed in earlier work to the spectrum of baryons with strangeness -2 and -3. The model describes a number of well-established baryons successfully, and application to cascade baryons allows the quantum numbers of some known states to be deduced. [JLAB-THY-07-728].
120869047
Elastic Scattering of 580-MeV Protons from He 3
The elastic differential cross section for $p$-$^{3}\mathrm{He}$ scattering has been measured at 580 MeV. The data are compared with a Glauber model calculation.
93503786
Quasi-Elastic Reactions with 600 MeV Protons
A measurement of the (p,2p) differential cross section dσ/dEdΩldΩ2 at 600 MeV on Deuterium and Helium-4 at the NASA Space Radiation Effects Laboratory is reported [1], [2]. Two coincident protons were detected with identical range telescopes. The energy sum of the outgoing protons was constrained to be equal to the incident energy minus the S-state proton separation energy, 2.2 and 20.4 MeV for D and He-4, respectively. By varying the detection angles symmetrically to the beam, events were selected with nuclear recoil momentum \(\vec q_r = \vec p_o - (\vec p_1 + \vec p_2 )\) along the beam line. Values of qr up to 370 MeV/c in D and 300 MeV/c in He-4 were observed.
120709149
Elastic scattering of 600-MeV protons from H, D, He-3, and He-4.