A new hadron spectroscopy

doi:10.1007/s11467-014-0449-6

Front. Phys.

2015, Vol. 10

Issue (2) : 125-158 https://doi.org/10.1007/s11467-014-0449-6

REVIEW ARTICLE

A new hadron spectroscopy

Stephen Lars Olsen(

)

Center for Underground Physics, Institute of Basic Science, Daejeon 305-811, Korea

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Abstract

QCD-motivated models for hadrons predict an assortment of “exotic” hadrons that have structures that are more complex than the quark-antiquark mesons and three-quark baryons of the original quark-parton model. These include pentaquark baryons, the six-quark H -dibaryon, and tetraquark, hybrid and glueball mesons. Despite extensive experimental searches, no unambiguous candidates for any of these exotic configurations have been identified. On the other hand, a number of meson states, one that seems to be a proton-antiproton bound state, and others that contain either charmed-anticharmed quark pairs or bottom-antibottom q uark pairs, have been recently discovered that neither fit into the quark-antiquark meson picture nor match the expected properties of the QCD-inspired exotics. Here I briefly review results from a recent search for the H -dibaryon, and discuss some properties of the newly discovered states –the proton-antiproton state and the so-called XYZ mesons– and compare them with expectations for conventional quark-antiquark mesons and the predicted QCD-exotic states.

Keywords quarks charmonium pentaquarks di-baryons baryonium tetraquarks

Corresponding Author(s): Stephen Lars Olsen

Issue Date: 13 March 2015

Cite this article:

Stephen Lars Olsen. A new hadron spectroscopy[J]. Front. Phys. , 2015, 10(2): 125-158.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-014-0449-6
https://academic.hep.com.cn/fop/EN/Y2015/V10/I2/125

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[5]	Adrian Perieanu, on behalf of the CMS Collaboration. Results on non-SUSY searches for physics beyond standard model in pp collisions at CMS[J]. Front. Phys. , 2013, 8(3): 257-269.

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