Since nine years experiments have been observing a host of exotic states decaying into heavy quarkonia. The interpretation of most of them still remains uncertain and, in some cases, controversial, notwithstanding a considerable progress has been made on the quality of the experimental information available and a number of ideas and models have been put forward to explain the observations. In this mini-review we will summarize the measurements, with the most recent updates, and list the useful ones yet to be done. We will discuss the problem of the spin of the X, which could hide some major surprise on its interpretation, and review some more phenomenological issues debated in the field.
EXOTIC HEAVY QUARKONIUM SPECTROSCOPY: A MINI-REVIEW / Faccini, Riccardo; Pilloni, Alessandro; Polosa, ANTONIO DAVIDE. - In: MODERN PHYSICS LETTERS A. - ISSN 0217-7323. - 27:29(2012), p. 1230025. [10.1142/s021773231230025x]
EXOTIC HEAVY QUARKONIUM SPECTROSCOPY: A MINI-REVIEW
FACCINI, Riccardo;PILLONI, ALESSANDRO;POLOSA, ANTONIO DAVIDE
2012
Abstract
Since nine years experiments have been observing a host of exotic states decaying into heavy quarkonia. The interpretation of most of them still remains uncertain and, in some cases, controversial, notwithstanding a considerable progress has been made on the quality of the experimental information available and a number of ideas and models have been put forward to explain the observations. In this mini-review we will summarize the measurements, with the most recent updates, and list the useful ones yet to be done. We will discuss the problem of the spin of the X, which could hide some major surprise on its interpretation, and review some more phenomenological issues debated in the field.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
