Observation of a diffractive contribution to dijet production inproton proton collisions at root s 7 TeV
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
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Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | Physical Review D Particles Fields Gravitation and Cosmology (Q4) | ||
| Dergi ISSN | 1550-7998 | ||
| Dergi Tarandığı Indeksler | SCI | ||
| Makale Dili | İngilizce | Basım Tarihi | 01-2013 |
| Cilt / Sayı / Sayfa | 87 / 1 / – | DOI | 10.1103/PhysRevD.87.012006 |
| UAK Araştırma Alanları |
Yüksek Enerji ve Parçacık Fiziği
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| Özet |
| A significant fraction of the total inelastic proton-proton cross section at high energies is attributed to diffractive processes, characterized by the presence of a large rapidity region¡ y with no hadrons, usually called ‘‘rapidity gap’’[rapidity is defined as y º 1= 2filnΩ EpZfi= E¿ pZfiä, where E and pZ are the energy and longitudinal momentum of the final-state particle, respectively]. Diffractive scattering is described in the framework of Regge theory as mediated by a strongly interacting color-singlet exchange with the vacuum quantum numbers, the so-called ‘‘pomeron trajectory’’[1]. Diffractive events with a hard parton-parton scattering are especially interesting because they can be studied in terms of perturbative quantum chromodynamics (pQCD). In diffractive events the proton emitting the pomeron either remains intact, losing only a few percent of its momentum, or is found in a low mass excited state. In addition, since the vacuum quantum numbers are exchanged, no particles are produced in a large rapidity range adjacent to the scattered proton (or its dissociation products). Diffraction with a hard scale has been studied in protonantiproton (p" p) and electron-proton (ep) collisions at CERN [2], Fermilab [3–6], and DESY [7–10]. Such hard diffractive processes can be described in terms of the convolution of diffractive parton distribution functions (dPDFs) and hard scattering cross sections, which are calculable in pQCD. In this approach, the pomeron is treated as a color-singlet combination of partons with the vacuum quantum numbers. The dPDFs have been determined by the HERA experiments [7, 9] by means of QCD fits to inclusive diffractive … |
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BM Sürdürülebilir Kalkınma Amaçları
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| Scopus | 38 |