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Theoretical Development on Pentaquarks  [PDF]
Shi-Lin Zhu
Physics , 2004, DOI: 10.1142/S0217751X05022974
Abstract: I first give a brief overview of the status of exotic hadron search so far. Then I review the recent theoretical development on pentaquarks. Finally I emphasize that none of theoretical formalisms predicts the existence of $\Theta$ pentaquark very reliably. None of them explains its narrow width in a natural way.
Pentaquarks: Status and Perspectives for Lattice Calculations  [PDF]
Shoichi Sasaki
Physics , 2004, DOI: 10.1016/j.nuclphysbps.2004.11.354
Abstract: The present status of pentaquark spectroscopy in lattice QCD is reviewed. This talk also includes a brief introduction of pentaquark baryons.
Pentaquarks  [PDF]
Shi-Lin Zhu
Physics , 2004, DOI: 10.1142/S0217751X04019676
Abstract: Since LEPS collaboration reported the first evidence of $\Theta^+$ pentaquark in early 2003, eleven other experimental groups have confirmed this exotic state while many other groups didn't see any signal. If this state is further established by future high statistical experiments, its discovery shall be one of the most important events in hadron physics for the past three decades. This exotic baryon with such a low mass and so narrow a width imposes a big challenge to hadron theorists. Up to now, there have appeared more than two hundred theoretical papers trying to interpret this charming state. I will review some important theoretical developments on pentaquarks based on my biased personal views.
Quarkonia & Pentaquarks  [PDF]
Kamal K. Seth
Physics , 2005, DOI: 10.1142/S0217751X05028247
Abstract: A brief review of the latest developments in the spectroscopy of heavy quarks is presented. The current status of the recently `discovered' pentaquarks is also discussed.
On the Theoretical Status of Deep Inelastic Scattering  [PDF]
J. Blümlein
Physics , 1995,
Abstract: The theoretical status of perturbative QED and QCD corrections to deep inelastic scattering is reviewed.
Pentaquarks: review of the experimental evidence  [PDF]
Sonia Kabana
Physics , 2005, DOI: 10.1088/0954-3899/31/6/078
Abstract: Pentaquarks, namely baryons made by 4 quarks and one antiquark have been predicted and searched for since several decades without success. Theoretical and experimental advances in the last 2 years led to the observation of a number of pentaquark candidates. We review the experimental evidence for pentaquarks as well as their non-observations by some experiments, and discuss to which extend these sometimes contradicting informations may lead to a consistent picture.
Theoretical status of epsilon'/epsilon  [PDF]
Matthias Jamin
Physics , 1999,
Abstract: The present theoretical status of the parameter for direct CP violation epsilon'/epsilon in the Standard Model is reviewed and compared with most recent experimental measurements of the same quantity. After collecting the basic expressions for epsilon'/epsilon, the situation of hadronic matrix element calculations is summarised. The matrix elements constitute the dominant source of uncertainty for theoretical determinations of epsilon'/epsilon. For central values of the input parameters, the numerical analysis then yields results which are generally below the experimental data. Possible reasons for these findings are discussed.
Experimental Search for Pentaquarks  [PDF]
K. Hicks
Physics , 2005, DOI: 10.1016/j.ppnp.2005.05.002
Abstract: The experimental evidence for pentaquarks, both old an new, is discussed. Constraints due to $K^+N$ scattering data from previous decades is first reviewed, followed by experiments with positive evidence and those with null results. Finally, the problem of the narrow width of the Theta+ pentaquark is discussed, along with theoretical implications.
Experimental Review on Pentaquarks  [PDF]
Michael Danilov
Physics , 2005,
Abstract: The experimental evidence for pentaquarks is reviewed and compared with the experiments that do not see any sign of pentaquarks.
Theoretical Status of epsilon'/epsilon  [PDF]
Andrzej J. Buras
Physics , 1999,
Abstract: We review the present theoretical status of the CP violating ratio epsilon'/epsilon in the Standard Model (SM) and confront its estimates with the most recent data. In particular we review the present status of the most important parameters m_s, B_6^(1/2), B_8^(3/2), \Lambda_MSbar and Omega_{\eta+\eta'}. While the sign and the order of magnitude of SM estimates for epsilon'/epsilon agree with the data, for central values of these parameters most estimates of epsilon'/epsilon in the SM are substantially below the grand experimental average (21.2\pm 4.6)\cdot 10^{-4}. Only in a small corner of the parameter space can epsilon'/epsilon in SM be made consistent with experimental results. In view of very large theoretical uncertainties, it is impossible to conclude at present that the data on epsilon'/epsilon indicate new physics. A brief discussion of epsilon'/epsilon beyond the Standard Model is presented.
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