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Measurement of central exclusive p+p- production in p¯p collisions at vs=0.9 and 1.96 TeV at CDF

Abstract: We measure exclusive p+p- production in proton-antiproton collisions at center-of-mass energies vs=0.9 and 1.96 TeV in the Collider Detector at Fermilab. We select events with two oppositely charged particles, assumed to be pions, with pseudorapidity |?|<1.3 and with no other particles detected in |?|<5.9. We require the p+p- system to have rapidity |y|<1.0. The production mechanism of these events is expected to be dominated by double pomeron exchange, which constrains the quantum numbers of the central state. The data are potentially valuable for isoscalar meson spectroscopy and for understanding the pomeron in a region of transition between nonperturbative and perturbative quantum chromodynamics. The data extend up to dipion mass M(p+p-)=5000??MeV/c2 and show resonance structures attributed to f0 and f2(1270) mesons. From the p+p- and K+K- spectra, we place upper limits on exclusive ?c0(3415) production.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Phys. Rev. D, Vol. 91, Num. 9, Pag. 091101(R) (2015)

Editorial: American Physical Society

 Fecha de publicación: 01/05/2015

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevD.91.091101

ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Url de la publicación: https://doi.org/10.1103/PhysRevD.91.091101