Jet cone size dependence of inclusive cross-sections toO(? s 3 )

Aversa, F.; Chiappetta, P.; Gonzales, L. A.; Greco, Mario; Guillet, J. Ph.

doi:10.1007/bf01549699

Cited by 35 publications

(25 citation statements)

References 13 publications

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“…Neglecting O(R 2 ) pieces, the evaluation and phase-space integration of the partonic cross sections can be performed analytically. This approximation has been shown [231,232,233,147] to account extremely well for jet observables up to cone sizes of about R ≈ 0.7 in related pp-scattering reactions by explicit comparison to calculations that take R fully into account. Figure 1.50 presents our results [234] for the expected NLO double-spin asymmetry A jet LL for single-inclusive jet photoproduction at √ S = 100 GeV for two different choices of proton helicity densities [24,25] and the two extreme sets of polarized photon densities introduced above.…”

Section: Barbara Jäger Marco Stratmannmentioning

confidence: 94%

“…We work in the so-called "small-cone approximation" [227,228,229,230,231] which can be considered as an expansion of the jet cross section in terms of R of the form A log R + B + O(R 2 ). Neglecting O(R 2 ) pieces, the evaluation and phase-space integration of the partonic cross sections can be performed analytically.…”

Section: Barbara Jäger Marco Stratmannmentioning

confidence: 99%

“…A frequently adopted choice is to define a jet as the deposition of the total transverse energy of all final-state partons that fulfill (η − η i ) 2 + (φ − φ i ) 2 ≤ R 2 , where η i and φ i denote the pseudo-rapidities and azimuthal angles of the particles and R the jet cone aperture. We work in the so-called "small-cone approximation" [227,228,229,230,231] which can be considered as an expansion of the jet cross section in terms of R of the form A log R + B + O(R 2 ). Neglecting O(R 2 ) pieces, the evaluation and phase-space integration of the partonic cross sections can be performed analytically.…”

Section: Barbara Jäger Marco Stratmannmentioning

confidence: 99%

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Gluons and the quark sea at high energies: distributions, polarization, tomography

Boer¹,

Diehl²,

Milner³

et al. 2011

198

291

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ForewordThe study of the fundamental structure of nuclear matter is a central thrust of physics research in the United States. As indicated in Frontiers of Nuclear Science, the 2007 Nuclear Science Advisory Committee long range plan, consideration of a future Electron-Ion Collider (EIC) is a priority and will likely be a significant focus of discussion at the next long range plan. We are therefore pleased to have supported the ten week program in fall 2010 at the Institute of Nuclear Theory which examined at length the science case for the EIC. This program was a major effort; it attracted the maximum allowable attendance over ten weeks.This report summarizes the current understanding of the physics and articulates important open questions that can be addressed by an EIC. It converges towards a set of "golden" experiments that illustrate both the science reach and the technical demands on such a facility, and thereby establishes a firm ground from which to launch the next phase in preparation for the upcoming long range plan discussions. We thank all the participants in this productive program. In particular, we would like to acknowledge the leadership and dedication of the five co-organizers of the program who are also the co-editors of this report.David Kaplan, Director, National Institute for Nuclear Theory Hugh Montgomery, Director, Thomas Jefferson National Accelerator Facility Steven Vigdor, Associate Lab Director, Brookhaven National Laboratory iii Preface This volume is based on a ten-week program on "Gluons and the quark sea at high energies", which took place at the Institute for Nuclear Theory (INT) in Seattle from September 13 to November 19, 2010. The principal aim of the program was to develop and sharpen the science case for an Electron-Ion Collider (EIC), a facility that will be able to collide electrons and positrons with polarized protons and with light to heavy nuclei at high energies, offering unprecedented possibilities for in-depth studies of quantum chromodynamics. Guiding questions were• What are the crucial science issues?• How do they fit within the overall goals for nuclear physics?• Why can't they be addressed adequately at existing facilities?• Will they still be interesting in the 2020's, when a suitable facility might be realized?The program started with a five-day workshop on "Perturbative and Non-Perturbative Aspects of QCD at Collider Energies", which was followed by eight weeks of regular program and a concluding four-day workshop on "The Science Case for an EIC".More than 120 theorists and experimentalists took part in the program over ten weeks. It was only possible to smoothly accommodate such a large number of participants because of the extraordinary efforts of the INT staff, to whom we extend our warm thanks and appreciation. We thank the INT Director, David Kaplan, for his strong support of the program and for covering a significant portion of the costs for printing this volume. We gratefully acknowledge additional financial support provided by BNL and JLab.The program w...

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Section: Barbara Jäger Marco Stratmannmentioning

confidence: 94%

Section: Barbara Jäger Marco Stratmannmentioning

confidence: 99%

Section: Barbara Jäger Marco Stratmannmentioning

confidence: 99%

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Gluons and the quark sea at high energies: distributions, polarization, tomography

Boer¹,

Diehl²,

Milner³

et al. 2011

198

291

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“…Figure 6 shows the variation of the cross section with cone size for E t =100 GeV jets from CDF compared with O(α 3 s ) predictions [66,67,68]. The data display the statistical errors only, but the ≈ 23 % systematic uncertainties are largely independent of R. Since there are only two back-to-back partons in the LO calculation, one can only predict such a variation beginning at NLO.…”

Section: Inclusive Jet Productionmentioning

confidence: 99%

QCD Tests in Proton-Antiproton Collisions

Huth¹,

Mangano²

1993

Annu. Rev. Nucl. Part. Sci.

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“…The NLO corrections to conventional high p ⊥ jet production cross section were computed in [18], [19] and [20] for Tevatron energies. Later the code of [19] was used for calculating this cross section for RHIC and LHC energies in [21].…”

Section: Introductionmentioning

confidence: 99%

Minijet transverse-energy production in the next-to-leading order in hadron and nuclear collisions

Leonidov

Ostrovsky

1999

Eur. Phys. J. C

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The transverse energy flow generated by minijets in hadron and nuclear collisions into a given rapidity window in the central region is calculated in the next-toleading (NLO) order in QCD at RHIC and LHC energies. The NLO transverse energy production in pp collisions cross sections are larger than the LO ones by the factors of K RHIC ∼ 1.9 and K LHC ∼ 2.1 at RHIC and LHC energies correspondingly. These results were then used to calculate transverse energy spectrum in nuclear collisions in a Glauber geometrical model. We show that accounting for NLO corrections in the elementary pp collisions leads to a substantial broadening of the E ⊥ distribution for the nuclear ones, while its form remains practically unchanged.

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Jet cone size dependence of inclusive cross-sections toO(? s 3 )

Cited by 35 publications

References 13 publications

Gluons and the quark sea at high energies: distributions, polarization, tomography

Gluons and the quark sea at high energies: distributions, polarization, tomography

QCD Tests in Proton-Antiproton Collisions

Minijet transverse-energy production in the next-to-leading order in hadron and nuclear collisions

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