A search for glueballs and a study of doouble pomeron exchange at the CERN intersecting storage rings

Åkesson, T. P. A.; Albrow, M.; Almehed, S.; Batley, Richard; Benary, O.; Bøggild, H.; Botner, O.; Breuker, H.; Burkert, Volker; Carosi, R.; Carter, A. A.; Carter, J. R.; Cecil, P.; Chung, S. U.; Cleland, W.; Cockerill, D.; Dagan, S.; Dahl‐Jensen, E.; Dahl-Jensen, I.; Dam, P.; Damgaard, G.; Evans, Wynne; Fabjan, C.; Frandsen, P.; Frankel, S.; Frati, W.; Gibson, Murray; Goerlach, U.; Goodrick, M. J.; Hansen, Klavs; Hedberg, V.; Hiddleston, J. W.; Hilke, H. J.; Jarlskog, G.; Killian, T.; Kroeger, R.; Kulka, K.; Lans, J. van der; Lindsay, J.; Lissauer, D.; Lörstad, B.; Ludlam, T.; Μάρκου, Α.; McCubbin, N. A.; Mjörnmark, U.; Möller, R.; Molzon, W.; Nielsen, B. S.; Nilsson, Anders; Olsen, L.; Oren, Y.; Pritchard, T. W.; Rosselet, L.; Rosso, E.; Rudge, A.; Stumer, I.; Sullivan, M. K.; Thompson, J.; Thorstenson, G.; Vella, E.; Weygand, D. P.; Williamson, J.; Willis, W.; Winik, M.; Witzeling, W.; Woody, C.; Zajc, W. A.

doi:10.1016/0550-3213(86)90477-3

Cited by 102 publications

(78 citation statements)

References 28 publications

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“…They selected pp → ppπ + π − events at a center of mass energy of √ s = 62 GeV with two leading protons at large Feynman-x x F > 0.9. The results obtained are comparable to the results from the AFS experiment [100]. Due to the different allowed 4-momentum region for the protons, the mass distributions show a different shape.…”

Section: Early Cep Searchessupporting

confidence: 80%

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Observation of Central Exclusive Diphoton Production at the Tevatron

Brücken

2013

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UKCover image: Event display of an exclusive γγ candidate recorded by CDF II (event 14704042, run 243808). Shown is the calorimeter lego plot (top), the central outer tracker (bottom left) and the r-z plot of the CDF detector (bottom right). AbstractWe have observed exclusive γγ production in proton-antiproton collisions at the Tevatron at √ s = 1.96 TeV. We use data corresponding to 1.11 ± 0.07 fb −1 integrated luminosity taken by the Run II Collider Detector at Fermilab, with a trigger requiring two electromagnetic showers, each with transverse energy E T > 2 GeV, and vetoing on hits in the forward beam shower counters. We select events with two electromagnetic showers, each with transverse energy E T > 2.5 GeV and pseudorapidity |η| < 1.0, with no other particles detected in −7.4 < η < +7.4. The two showers have similar E T and an azimuthal angle separation Δφ ∼ π; we find 34 events with exactly two matching charged particle tracks, agreeing with expectations for the QED process pp → p + e + e − +p by two photon exchange; and we find 43 events with no tracks. The latter are candidates for the exclusive process pp → p + γγ +p by double pomeron exchange. We use the strip and wire chambers at the longitudinal shower maximum position within the calorimeter to measure a possible exclusive background from IP + IP → π 0 π 0 , and conclude that it is consistent with zero and is < 15 events at 95% C.L. The measured cross section is σ γγ,excl (|η| < 1, E T (γ) > 2.5 GeV) = 2.48

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Section: Early Cep Searchessupporting

confidence: 80%

“…This improved substantially with the advent of the Axial Field Spectrometer (AFS). The AFS collaboration studied central exclusive production of mesons, mainly charged pions but also kaons and proton-antiproton pairs [100]. The reference also includes a short description of the detector.…”

Section: Early Cep Searchesmentioning

confidence: 99%

Observation of Central Exclusive Diphoton Production at the Tevatron

Brücken

2013

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“…(6), (7), and (12) are about the same for the two body decays of the f 2 , f 0 2 and the G 2 . It is obtained…”

mentioning

confidence: 74%

2++glueball

2012

Phys. Rev. D

116

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“…However, the only measurements at high energies were performed at the CERN ISR for √ s = 62 GeV [3,4] and √ s = 63 GeV [5]. A measurement at higher energy can add to the understanding of the diffractive reaction mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Staszewski¹,

Lebiedowicz²,

Trzebiński³

et al. 2011

Acta Phys. Pol. B

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A process of central exclusive π + π − production in proton-proton collisions and its theoretical description is presented. A possibility of its measurement, during the special low luminosity LHC runs, with the help of the ATLAS central detector for measuring pions and the ALFA stations for tagging the scattered protons is studied. A visible cross-section is estimated to be 21 µb for √ s = 7 TeV, which gives over 2000 events for 100 µb −1 of integrated luminosity. Differential distributions in pion pseudorapidities, pion and proton transverse momenta as well as π + π − invariant mass are shown and discussed.

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A search for glueballs and a study of doouble pomeron exchange at the CERN intersecting storage rings

Cited by 102 publications

References 28 publications

Observation of Central Exclusive Diphoton Production at the Tevatron

Observation of Central Exclusive Diphoton Production at the Tevatron

2++glueball

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