Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Close, Frank E."'
Publikováno v:
Phys.Rev.D77:094005,2008
We propose a search for the newly discovered tetraquark candidate Z(4430) in photoproduction. Based on the Belle results we show that if Z(4430) is a genuine resonance, its significantly large coupling to $\psi^\prime\pi$ will cause it to stand out a
Externí odkaz:
http://arxiv.org/abs/0802.2648
Autor:
Zhao, Qiang, Close, Frank E.
A "$\Lambda$ selection rule" for $N^*$ resonances in the presence of QCD mixing effects is identified. Due to the QCD mixing, excitations of {\bf 20}-plets are possible in SU(6). We show that this selection rule is useful for classifying PDG states a
Externí odkaz:
http://arxiv.org/abs/0711.0151
Autor:
Zhao, Qiang, Close, Frank E.
Publikováno v:
Phys.Rev.D74:094014,2006
We identify a "$\Lambda$ selection rule" for $N^*$ resonances in the presence of QCD mixing effects. We quantify these mixing effects from existing data and predict amplitudes for exciting {\bf 20} representations in SU(6), which are forbidden in str
Externí odkaz:
http://arxiv.org/abs/hep-ph/0605336
Publikováno v:
Nucl.Phys. A771 (2006) 2-7, Nucl.Phys. A771 (2006) 8-25
Professor Richard H. Dalitz passed away on January 13, 2006. He was almost 81 years old and his outstanding contributions are intimately connected to some of the major breakthroughs of the 20th century in particle and nuclear physics. These outstandi
Externí odkaz:
http://arxiv.org/abs/physics/0603219
Autor:
Close, Frank E., Page, Philip R.
Publikováno v:
Phys.Lett.B628:215-222,2005
We confront predictions for hybrid charmonium and other gluonic excitations in the charm region with recently observed structures in the mass range above 3 GeV. The Y(4260), if resonant, is found to agree with expectations for hybrid charmonium. The
Externí odkaz:
http://arxiv.org/abs/hep-ph/0507199
Autor:
Close, Frank E., Zhao, Qiang
Publikováno v:
Phys.Rev.D71:094022,2005
A coherent study of the production of $f_0^i$ ($i=1$, 2, 3 corresponding to $f_0(1710)$, $f_0(1500)$, and $f_0(1370)$) in $J/\psi\to V f_0 \to V PP$ is reported based on a previously proposed glueball and $Q\bar{Q}$ nonet mixing scheme, and a factori
Externí odkaz:
http://arxiv.org/abs/hep-ph/0504043
Autor:
Zhao, Qiang, Close, Frank E.
Publikováno v:
Int.J.Mod.Phys. A20 (2005) 1910-1913
We show how deviations from the dimensional scaling laws for exclusive processes may be related to a breakdown in the locality of quark-hadron duality, i.e. the "restricted locality". For exclusive reactions like meson photo- and electroproduction ab
Externí odkaz:
http://arxiv.org/abs/hep-ph/0411257
Autor:
Zhao, Qiang, Close, Frank E.
Publikováno v:
J.Phys. G31 (2005) L1
A systematic lowering in mass of strangeness ambiguous $pK^0_S$ peaks relative to the $nK^+$ is noted. 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
Externí odkaz:
http://arxiv.org/abs/hep-ph/0404075
Autor:
Close, Frank E., Zhao, Qiang
Publikováno v:
Phys.Lett. B590 (2004) 176-184
We present constraints on the {\it relative} photoproduction cross sections of positive parity pentaquark states, $\Sigma_5$, $\Lambda_5$, and $N_5$, based on a minimum phenomenology gained in $\gamma N \to K \Theta^+$ and their baryon-meson coupling
Externí odkaz:
http://arxiv.org/abs/hep-ph/0403159
Autor:
Close, Frank E., Zhao, Qiang
Publikováno v:
Phys.Lett. B586 (2004) 332-336
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.
Comment: Revtex, 5 pages, 3 figures; An arithmetic error with Eq.(7) was corrected; Rele
Comment: Revtex, 5 pages, 3 figures; An arithmetic error with Eq.(7) was corrected; Rele
Externí odkaz:
http://arxiv.org/abs/hep-ph/0402090