Decays of the f0(1370) scalar glueball candidate in pp Central Exclusive Production (CEP) and in antiproton annihilations at rest
Abstract
Decays into π+π- of the f0(1370) are the main source of an isolated structure localized between 1.2 and 1.5 GeV in the π+π- mass spectrum measured in pp Central Exclusive Production (CEP) at √s=200 GeV at very low four momentum transfer ltl by the STAR experiment. These data confirm in the π+π- decay channel the existence of the f0(1370) as an isolated well identified structure previously observed in K+K-, KsKs, π+π-π+π-, 2π0π+π- and 4π0 decays measured in pbar annihilations at rest. The ensemble of these data point at a high gg content of the f0(1370). CEP interactions at higher energies favour production of 0++ and 2++ mesons. Selection of events with lower ltl at both proton vertices suppresses 2++ structures. LHC runs dedicated to pp CEP measurements at low ltl could then provide a unique source of all the low energy scalars. This would make it clear if and where scalar gluonium is resident and the nature (composition in terms of qqbar, qqqbarqbar, qqbar-qqbar and gg) of f0(500), f0(980), f0(1370), f0(1500) and f0(1710).
- Publication:
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European Physical Journal Web of Conferences
- Pub Date:
- November 2018
- DOI:
- 10.1051/epjconf/201819200036
- arXiv:
- arXiv:1810.06388
- Bibcode:
- 2018EPJWC.19200036G
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 8 pages, 5 figures, presented at QCD@Work-International Workshop on QCD Theory and Experiment, 25-28 June 2018, Matera, Italy (to be published in Proceedings). arXiv admin note: text overlap with arXiv:1809.04496