Options for the SELEX state D$_{s\J}^+(2632)$ (2004)
Barnes, T, Close, Francis Edwin, Dudek, J J, Godfrey, S, Swanson, E S
We consider possible assignments for the D$_{s\J}^+(2632)$, which was recently reported in D$_s^+\eta$ and D$^0$K$^+$ final states by the SELEX Collaboration at Fermilab. The most plausible quark...
Options for the SELEX state D$_{s\J}^+(2632)$ (2004)
Barnes, T, Close, Francis Edwin, Dudek, J J, Godfrey, S, Swanson, E S
We consider possible assignments for the D$_{s\J}^+(2632)$, which was recently reported in D$_s^+\eta$ and D$^0$K$^+$ final states by the SELEX Collaboration at Fermilab. The most plausible quark...
On the experimental status of $\Theta^+$ and $\Sigma^+_5$ pentaquarks (2004)
Zhao Qiang, Close, Francis Edwin
We discuss how measurement of $\gamma p\to \Theta^+ K^0_S\to p K^0_S K^0_S \to p\pi^+\pi^-\pi^+\pi^-$ in association with $\gamma p\to \Theta^+ K^0_S\to n K^+ K^0_S$ can help to clarify the nature of...
On the experimental status of $\Theta^+$ and $\Sigma^+_5$ pentaquarks (2004)
Zhao Qiang, Close, Francis Edwin
We discuss how measurement of $\gamma p\to \Theta^+ K^0_S\to p K^0_S K^0_S \to p\pi^+\pi^-\pi^+\pi^-$ in association with $\gamma p\to \Theta^+ K^0_S\to n K^+ K^0_S$ can help to clarify the nature of...
A note on glueball hunting in the $e^+e^- \to J/\psi\to \phi f_0$ (2004)
Close, Francis Edwin, Zhao Qiang
Building on recent work by Brodsky {\it et al.}, we advocate searching for glueball degrees of freedom in $e^+e^- \to J/\psi\to \phi f_0$ at CLEO-c and BES.
The kinematic and symmetry structure of e+e- to hadron pairs (2004)
Close, Francis Edwin, Cottingham, W N
The kinematic singularity and constraint free amplitudes for e/sup +/e /sup -/ to two particles which can have arbitrary spins are obtained in a simple closed form. The relationships of these...
Radiative decays: a new flavour filter (2002)
Close, Francis Edwin, Donnachie, Alexander, Kalashnikova, Yu S
Radiative decays of the $1^3D_1$ orbital excitations of the $\rho$, $\omega$ and $\phi$ to the scalars $f_0(1370)$, $f_0(1500)$ and $f_0(1710)$ are shown to provide a flavour filter, clarifying the...
Radiative Decays of Excited Vector Mesons (2002)
Close, Francis Edwin, Donnachie, Alexander, Kalashnikova, Yu S
Radiative decays of the $1^3S_1$ radial and $1^3D_1$ orbital excitations of the $\rho$, $\omega$ and $\phi$ are calculated in the quark model, using wave functions obtained variationally from the...
Light Hadron Spectroscopy (2001)
Rapporteur talk at the Lepton-Photon Conference, Rome, July 2001: reviewing the evidence and strategies for understanding scalar mesons, glueballs and hybrids, the gluonic Pomeron and the interplay...
A study of the centrally produced $\pi0\pi0\pi0$ channel in pp interactions at 450 GeV/c (2001)
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
The reaction pp -> pf (pi0pi0pi0) ps has been studied at 450 GeV/c. The pi0pi0pi0 effective mass spectrum shows clear eta(547) and pi2(1670) signals. Branching ratios for the eta(547) and pi_2(1670)...
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
A partial wave analysis of the centrally produced eta pi0 and eta pi- channels has been performed in pp collisions using an incident beam momentum of 450 GeV/c. Clear a0(980) and a2(1320) signals...
A search for charmonium states produced in central pp interactions at 450 GeV/c (2000)
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
A search for centrally produced charmonium states has been presented. There is no significant evidence for any charmonium production. An upper limit of 2 nb is found for the cross section of chic...
A study of the $\omega\omega$ channel produced in central pp interactions at 450 GeV/c (2000)
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
The reaction pp -> pf (omega omega) ps has been studied at 450 GeV/c and a spin analysis of the omega omega channel has been performed for the first time in central production. Evidence is found for...
On the dependence of exclusive hadronic final states in lepton-hadron scattering (2000)
Cleymans, J, Close, F E, Close, Francis Edwin
A framework is presented for studying the omega dependence of exclusive hadronic final states in lepton-hadron scattering ( omega being Bjorken's scaling variable 2 M nu /Q/sup 2/). This is used for...
A study of the $\eta\eta$ channel produced in central pp interactions at 450 GeV/c (2000)
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
The reaction pp -> pf (eta eta) ps has been studied at 450 GeV/c. For the first time a partial wave analysis of the centrally produced eta eta system has been performed. Signals for the f0(1500),...
Voyage pour l'Antimonde (2000)
Journey to the Antiworld: What's the Matter with Antimatter The world is an asymmetrical place full of structure, yet a credo of modern physics is that there is a profound symmetry to Nature. In his...
Dynamics of Glueball and $q\overline{q}$ production in the central region of p p collisions (2000)
Close, Francis Edwin, Kirk, A, Schuler, G A
We explain the phi and t dependences of mesons with JPC = 0pm +,1^++,2pm +$ produced in the central region of pp collisions. For the 0++ and 2++ sector this reveals a systematic behaviour in the data...
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
The production and decay properties of the f0(1370), f0(1500), f0(2000) and f2(1950) have been studied in central pp interactions at 450 GeV/c. The dPT, phi and |t| distributions of these resonances...
A spin analysis of the $4\pi$ channels produced in central pp interactions at 450 GeV/c (1999)
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
The reactions pp -> pf (X0) ps, where X0 is observed decaying to pi0pi0pi0pi0, pi+pi-pi0pi0 and pi+pi-pi+pi-, have been studied at 450 GeV/c. There is evidence for an a2(1320)pi decay mode of the...
Experimental evidence for a vector-like behaviour of Pomeron exchange (1999)
Barberis, D, Binon, Freddy G, Close, Francis Edwin, Danielsen, K M, Donskov, S V, Earl, B C, ...
Evidence is presented that the Pomeron act as a non-conserved vector current. A study has been made of the azimuthal angle phi, which is defined as the angle between the pT vectors of the two...
Evidence that the Pomeron transforms as a non-conserved vector current (1999)
Close, Francis Edwin, Schuler, G A
The detailed dependences of central meson production on the azimuthal angle phi, t and the meson J^P are shown to be consistent with the hypothesis that the soft Pomeron transforms as a non-conserved...
Central production of mesons: exotic states versus Pomeron structure (1999)
Close, Francis Edwin, Schuler, G A
We demonstrate that the azimuthal dependence of central meson production in hadronic collisions, when suitably binned, provides unambiguous tests of whether the Pomeron couples like a conserved...
Barberis, D, Beusch, Werner, Binon, Freddy G, Blick, A M, Close, Francis Edwin, Danielsen, K M, ...
A study of the reactions pp -> pfps(K+K-pi+pi-) and pp -> pfps(K+K-pi+pi-pi0) shows evidence for the K*K* and phi omega channels respectively. The K*K* mass spectrum shows a broad distribution with a...
Barberis, D, Beusch, Werner, Binon, Freddy G, Blick, A M, Close, Francis Edwin, Danielsen, K M, ...
The reaction pp -> pf (pi+pi-pi0) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. The analysis...
Barberis, D, Beusch, Werner, Binon, Freddy G, Blick, A M, Close, Francis Edwin, Danielsen, K M, ...
The reaction pp -> pf (pi+pi-pi+pi-) ps has been studied at 450 GeV/c in an experiment designed to search for gluonic states. A spin analysis has been performed and the dPT filter applied. In...
A study of the $K\overline{K}\pi$ channel produced centrally in pp interactions at 450 GeV/c (1997)
Barberis, D, Beusch, Werner, Binon, Freddy G, Blick, A M, Close, Francis Edwin, Danielsen, K M, ...
Results are presented of an analysis of the reactions pp -> pf(k0k+pi-)ps and pp -> pf(K0K0pi0)ps at 450 GeV/c. Clear f1(1285) and f1(1420) signals are seen and a spin parity analysis shows that both...
A kinematical selection of glueball candidates in central production (1997)
Barberis, D, Beusch, Werner, Binon, Freddy G, Carney, J N, Close, Francis Edwin, Danielsen, K M, ...
A study of central meson production as a function of the difference in transverse momentum ($dP_T$) of the exchanged particles shows that undisputed $q \overline q$ mesons are suppressed at small...