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Observation of exclusive ?? production in pp¯ collisions at vs=1.96TeV

Abstract: We have observed exclusive  production in proton-antiproton collisions at ffiffis p ¼ 1:96 TeV, using data from 1:11  0:07 fb1 integrated luminosity taken by the Run II Collider Detector at Fermilab. We selected events with two electromagnetic showers, each with transverse energy ET > 2:5 GeV and pseudorapidity jj < 1:0, with no other particles detected in 7:4 << þ7:4. The two showers have similar ET and azimuthal angle separation  ; 34 events have two charged particle tracks, consistent with the QED process pp ! p þ eþe þ p by two-photon exchange, while 43 events have no charged tracks. The number of these events that are exclusive 00 is consistent with zero and is <15 at 95% C.L. The cross section for pp ! p þ  þ p with jðÞj < 1:0 and ETðÞ > 2:5 GeV is 2:48þ0:40 0:35ðstatÞ þ0:40 0:51ðsystÞ pb.

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

 Autoría: Aaltonen T., Albrow M.G., Álvarez González B., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Bae T., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bedeschi F., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Bisello D., Bizjak I., B

 Fuente: Physical Review Letters (2012) Volume 108, Issue 8, article number 081801

Editorial: American Physical Society

 Fecha de publicación: 01/02/2012

Nº de páginas: 7

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.108.081801

ISSN: 0031-9007,1079-7114

Url de la publicación: https://doi.org/10.1103/PhysRevLett.108.081801

Autores/as

AALTONEN, T.

BARBARA ALVAREZ GONZALEZ

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO

JOSE ENRIQUE PALENCIA CORTEZON