12527955
Glueball production in hadron and nucleus collisions
Abstract We elaborate on the hypothesis that in high energy hadron hadron and nucleus nucleus collisions the lowest mass glueballs are copiously produced from the gluon rich environment especially at high energy density. We discuss the particular glueball decay modes: 0 ++ ,2 ++ →K K and 0 ++ → π + π − l + l − .
125526418
Inclusive lepton pair production through virtual W, Z and γ gauge bosons in proton-antiproton collisions
Production cross sections for the inclusive reactions are calculated in differential and integrated form. The cross sections depend on five independent final state lepton nomentum variables and parametrically on the individual quark- gluon momentum fractions of the incident hadrons and on their center of mass energy (√s). Hard processes are calculated through first order in the strong coupling constant, the scale being set by the transverse momentum of the lepton pair (q⊥). A Sudakov exponentiation independent of √s is shown to extend smoothly from small q⊥ into the hard scattering domain. Numerical results for √s=.63 and 1.8 TeV are presented
123383371
Inclusive current-induced reactions and light-cone singularities☆
Abstract We analyze inclusive reactions of the type current + t → p + anything, where t denotes other the vacuum or a hadronic target and p a produced hadron state. Conditions in momentum space are derived which enforce the scaling behaviour due to a canonical leading light-cone singularity structure. The multiplicity for the production of p off a hadron target grow less fast than the c.m. energy. The problem of continuation of deep-inelastic scattering amplitudes to the annihilation channel is investigated. Finally we outline how hadronic scaling is obtained in the limit of finite current mass.
122080969
On the oscillatory modes of quarks in baryons
The color bond structure of a quark-antiquark system is extended, in the long-range approximation, self-consistently to the baryonic three-quark bond structure for SU(3)c and generally to the N-quark bond structure for SU(N)c. The universal (N-independent) mass square eigenvalues for massless quarks are 
M2=(HN)2≃2mρ2∑α=13N−3να+constant, να=0,1,2,… 
.
18215199
Mapping out the QCD phase transition in multiparticle production
We analyse multiparticle production in a thermal framework for seven central nucleus + nucleus collisions, e+ + e- annihilation into hadrons on the Z resonance and four hadronic reactions p + p and p + ; with partial centrality selection), with centre of mass energies ranging from = 2.6 GeV (per nucleon pair) to 1.8 TeV. Thermodynamic parameters at chemical freeze-out (temperature and baryon and strangeness fugacities) are obtained from appropriate fits, generally improving in quality for reactions subjected to centrality cuts. All systems with non-vanishing fugacities are extrapolated along trajectories of equal energy density, density and entropy density to zero fugacities. The so-obtained temperatures extrapolated to zero fugacities as a function of initial energy density ein universally show a strong rise followed by a saturating limit of Tlim = 155 ± 6 ± 20 MeV. We interpret this behaviour as mapping out the boundary between quark gluon plasma and hadronic phases. The ratio of strange antiquarks to light ones as a function of the initial energy density ein shows the same behaviour as the temperature, saturating at a value of 0.365 ± 0.033 ± 0.07. No distinctive feature of `strangeness enhancement' is seen for heavy ion collisions relative to hadronic and leptonic reactions, when compared at the same initial energy density.
120475555
Double beta decay, the tellurium-xenon systems and the electron associated neutrino mass☆
The features of double beta decay, common to many even-even nuclei are discussed in the light of a non-vanishing (Majorana) neutrino mass (matrix). The latter is considered to be the only lepton number violating effect perceptible at mass scales of a few MeV, characteristic for 2β± decays. Estimates of the nuclear matrix elements mediating 2β−, 2ν and 2β−, 0ν final states are confronted with the relative rate of the 128Te→128Xe and 130Te→130Xe transitions. 
 
It is found that the experimental rates do imply a violation of lepton number. The electron associated neutrino mass is found to be of the order of one electron volt. A conservative lower bound is 
mνe ⩾ 0.8 eV, mνe = ∑j|Uej|2mνj, ∑j|ej|2 = 1 
.
121380547
A highly sensitive optical detector for use in deep underwater
Abstract We have developed an optical detector module for use in deep underwater experiments that will search for high-energy neutrinos from cosmic rays and astronomical sources. This module is sensitive to single photons, is operable under high pressure, functions automatically and is remotely controlled. The optical module is based on a 15 in. diameter photomultiplier tube (PMT), with control and read-out electronics mounted inside a 17 in. diameter glass pressure housing. The photomultiplier output signal is converted into two optical pulses by the electronics, one giving the hit time and time-over-threshold of the PMT output pulse and the other giving the charge-integrated PMT signal. Information on the arrival time and intensity of light can be extracted from these pulses. The time jitter of the optical modules is ∼6 and ∼2 ns at FWHM for one photoelectron and ∼100 photoelectrons, respectively. The unit requires 10 W power delivered at 48 V DC on a line with superposed bidirectional control signals. Fast output is uni-directional on a multi-mode fiber optic link to a remote time digitizer. The module has been successfully tested and calibrated in the laboratory, and several have briefly operated in the deep ocean.