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Apanasevich, L.; Bacigalupi, J.; Baker, W.; Begel, M.; Blusk, S.; Bromberg, C.; Chang, P.; Choudhary, B. C.; Chung, W. H.; Barbaro, L. de; DeSoi, W.; Długosz, W.; Dunlea, J.; Engels, E.; Fanourakis, G.; Ferbel, T.; Ftáčnik, J.; Garelick, D.; Ginther, G.; Glaubman, M.; Gutiérrez, P.; Hartman, K.; Huston, J.; Johnstone, C.; Kapoor, V.; Kuehler, J.; Lirakis, C.; Lobkowicz, F.; Lukens, P.; Mansour, J.; Maul, A.; Miller, R.; Oh, B.Y.; Osborne, G.; Pellett, D.; Prebys, E.; Roser, R.; Shepard, P. F.; Shivpuri, R. K.; Skow, D.; Slattery, P.; Sorrell, L.; Striley, D.; Toothacker, W. S.; Tripathi, S. M.; Varelas, N.; Weerasundara, D.; Whitmore, J.; Yasuda, T.; Yosef, C.; Zieliński, M.; Zutshi, V.

doi:10.1103/physrevd.68.052001

Cited by 30 publications

(8 citation statements)

References 81 publications

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“…In the following, we will consider neutral-pion production pp → π 0 X at two center-of-mass energies, √ s = 31.5 GeV and √ s = 200 GeV. The former corresponds to one of the energies used in the Fermilab fixed-target experiment E706 [69], while the latter is relevant for experiments at RHIC. Although we will not present any actual comparisons to data, we adopt the proper kinematics for these two cases, integrating over pseudorapidity |η| ≤ 0.75 in the E706 case and over |η| ≤ 0.35 for RHIC, corresponding to measurements by the PHENIX collaboration [70], and considering the cross sections as functions of pion transverse momentum, p T .…”

Section: Numerical Results For Fixed-order Expansionsmentioning

confidence: 99%

Threshold resummation at NNLL for single-particle production in hadronic collisions

et al. 2019

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We develop threshold resummation for single-particle inclusive cross sections in hadron-hadron collisions to the level of next-to-next-to-leading logarithm, up to full matching with two-loop hard functions. We define and calculate all one-loop soft functions for all partonic channels. This enables us to separate the hard and soft functions at one loop. Along with these results, the one-loop finite parts of jet functions are used to check that the full soft, collinear and virtual corrections are reproduced to one loop for all partonic reactions. We exhibit these NLO results explicitly. NLO expansions of the resummed cross section match the exact NLO results extremely well numerically, and two loop expansions result in substantial corrections over many kinematic configurations. Explicit results are given in Mellin moment space, and a number of options for generating resummed cross sections are discussed.

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Section: Numerical Results For Fixed-order Expansionsmentioning

confidence: 99%

Threshold resummation at NNLL for single-particle production in hadronic collisions

et al. 2019

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“…The recent data analyzed in this Letter are summarized in Table I. The data sets include π 0 measurements by the E706 at FNAL [11] and by the PHENIX collaboration at RHIC [9,12]. At higher energies, the measurements of charged hadrons (or charged tracks [14]) in p-p collisions at √ s = 630, 1800 GeV by CDF [13,14] and √ s = 500, 900 GeV by UA1 [15] are included in the analysis.…”

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confidence: 99%

Higher-Twist Dynamics in Large Transverse Momentum Hadron Production

et al. 2010

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A scaling law analysis of the world data on inclusive large-p ⊥ hadron production in hadronic collisions is carried out. A significant deviation from leading-twist perturbative QCD predictions at nextto-leading order is reported. The observed discrepancy is largest at high values ofIn contrast, the production of prompt photons and jets exhibits the scaling behavior which is close to the conformal limit, in agreement with the leading-twist expectation. These results bring evidence for a non-negligible contribution of higher-twist processes in large-p ⊥ hadron production in hadronic collisions, where the hadron is produced directly in the hard subprocess rather than by gluon or quark jet fragmentation. Predictions for scaling exponents at RHIC and LHC are given, and it is suggested to trigger the isolated large-p ⊥ hadron production to enhance higher-twist processes.

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“…Our starting point is the analysis of the cross section data in a broad kinematic region in the framework of perturbative QCD (pQCD), at nextto-leading order (NLO). It is a common belief that it should be best working in the central region, namely, for a π 0 produced near 90 o , in the center-ofmass system, although some authors have argued that the phenomenological inclusion of intrinsic k T effects leads to a better agreement between theory and data [11]. The inclusive invariant cross section for the reaction pp → π 0 X reads…”

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confidence: 99%

“…Note added : After this paper was completed, L. Bland and A. Ogawa have compared PYTHIA calculations of the invariant cross section with STAR and ISR data and they confirm our conclusions. [11,16,19,20,21] and the curves are the corresponding NLO pQCD calculations with µ = p T (solid lines) and µ = p T /2 (dotted-dashed lines).…”

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confidence: 99%

Do we understand the single-spin asymmetry for $\pi^0$ inclusive production in pp collisions?

Bourrely

Soffer

2004

Eur. Phys. J. C

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The cross section data for π 0 inclusive production in pp collisions is considered in a rather broad kinematic region in energy √ s, Feynman variable x F and transverse momentum p T . The analysis of these data is done in the perturbative QCD framework at the next-to-leading order. We find that they cannot be correctly described in the entire kinematic domain and this leads us to conclude that the single-spin asymmetry, A N for this process, observed several years ago at FNAL by the experiment E704 and the recent result obtained at BNL-RHIC by STAR, are two different phenomena.

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Production ofπ0andηmesons at large transverse momenta inppand
L. Apanasevich¹,
J. Bacigalupi²,
W. Baker³
et al.

Cited by 30 publications

References 81 publications

Threshold resummation at NNLL for single-particle production in hadronic collisions

Threshold resummation at NNLL for single-particle production in hadronic collisions

Higher-Twist Dynamics in Large Transverse Momentum Hadron Production

Do we understand the single-spin asymmetry for $\pi^0$ inclusive production in pp collisions?

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Production ofπ0andηmesons at large transverse momenta inppandL. Apanasevich1, J. Bacigalupi2, W. Baker3 et al.

Cited by 30 publications

References 81 publications

Threshold resummation at NNLL for single-particle production in hadronic collisions

Threshold resummation at NNLL for single-particle production in hadronic collisions

Higher-Twist Dynamics in Large Transverse Momentum Hadron Production

Do we understand the single-spin asymmetry for $\pi^0$ inclusive production in pp collisions?

Contact Info

Product

Resources

About

Production ofπ0andηmesons at large transverse momenta inppand
L. Apanasevich¹,
J. Bacigalupi²,
W. Baker³
et al.