Charged pion, kaon and nucleon production by e+e− annihilation for c.m. energies between 3.6 and 5.2 GeV

Brandelik, R.; Braunschweig, W.; Martyn, H. U.; Sander, H. G.; Schmitz, D.; Sturm, Walter; Wallraff, W.; Cords, D.; Felst, R.; Fries, Rainer J.; Gadermann, E.; Hultschig, H.; Joos, P.; Koch, W.; Kötz, U.; Krehbiel, H.; Kreinick, D. L.; Lynch, H. L.; McNeely, W.A.; Mikenberg, G.; Moffeit, K. C.; Notz, D.; Schliwa, Manfred; Shapira, A.; Wiik, B. H.; Wolf, G.; Ludwig, J.; Mess, K. H.; Petersen, A.; Poelz, G.; Ringel, Jeanne S.; Römer, O.; Rüsch, R.; Sauerberg, K.; Schmueser, Peter; Boer, W. De; Buschhorn, G.; Fues, W.; Gagern, C. von; Grindhammer, G.; Gunderson, B.; Kotthaus, R.; Lierl, H.; Oberlack, H.; Orito, S.; Suda, T.; Totsuka, Y.; Yamada, S.

doi:10.1016/0550-3213(79)90134-2

Cited by 84 publications

(15 citation statements)

References 56 publications

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“…Other data served us for cross checks. In particular, we probed the scaling violations in the FFs through comparisons with π ± , K ± , and p/p data from DESY DORIS and PETRA, with CM energies between 5.4 and 34 GeV [17]. Furthermore, we tested the gluon FF, which enters the unpolarized cross section only at NLO, by comparing our predictions for the longitudinal cross section, where it already 1 A FORTRAN subroutine which returns the values of the D h a (x, µ 2 ) functions for given values of x and µ 2 may be downloaded from the URL http://www.desy.de/~poetter/kkp.html or obtained upon request from the authors.…”

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confidence: 99%

“…[13], we already tested the scaling violations in our FFs, predicted by the timelike µ 2 evolution equations, by making comparisons with e + e − data of inclusive π ± , K ± , and p/p production in the energy range from √ s = 5.2 GeV to 44 GeV [17]. The advent of LEP2 data on e + e − → h ± + X with √ s = 133, 161, 172, 183, and 189 GeV, taken by DELPHI [22] and OPAL [23], enables us to gradually extend these tests towards high energies.…”

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confidence: 99%

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Testing the universality of fragmentation functions

2001

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Using fragmentation functions for charged pions, charged kaons, and (anti)protons recently extracted from experimental data of e + e − annihilation at the Z-boson resonance and at centre-of-mass energy √ s = 29 GeV, we perform a global study of inclusive charged-hadron production in pp, γp, and γγ collisions at next-to-leading order in the parton model of quantum chromodynamics. Comparisons of our results with pp data from CERN SppS and the Fermilab Tevatron, γp data from DESY HERA, and γγ data from CERN LEP2 allow us to test the universality of the fragmentation functions predicted by the factorization theorem. Furthermore, we perform comparisons with e + e − -annihilation data from LEP2 so as to test the scaling violations predicted by the Altarelli-Parisi evolution equations.

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confidence: 99%

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confidence: 99%

Testing the universality of fragmentation functions

2001

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“…Although these FFs are genuinely nonperturbative objects, they possess two important properties that follow from perturbative considerations within the QCD-improved parton model and are amenable to experimental tests, namely scaling violations and universality. The scaling violations were tested [8,13] by making comparisons with data of e + e − annihilation at CM energies below [20] and above [24] those pertaining to the data that entered the fits. The universality property was checked [13] by performing a global study of high-energy data on hadroproduction in pp collisions [14,15] and on photoproduction in e ± p [16] and e + e − [25] collisions.…”

Section: Discussionmentioning

confidence: 99%

“…1(a) and (b), where our LO and NLO fit results are compared with the ALEPH, DELPHI, OPAL, and SLD data [4,5]. Other data served us for cross checks [2,3,6,20,21]. In particular, we probed the scaling violations in the FFs through comparisons with π ± , K ± , and p/p data from DESY DORIS and PETRA, with CM energies between 5.4 and 34 GeV [20].…”

Section: Determination Of the Ffsmentioning

confidence: 99%

“…Other data served us for cross checks [2,3,6,20,21]. In particular, we probed the scaling violations in the FFs through comparisons with π ± , K ± , and p/p data from DESY DORIS and PETRA, with CM energies between 5.4 and 34 GeV [20]. Furthermore, we tested the gluon FF, which enters the unpolarized cross section only at NLO, by comparing our predictions for the longitudinal cross section, where it already enters at LO, with available data [2,21].…”

Section: Determination Of the Ffsmentioning

confidence: 99%

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Hadron Production in Hadron-Hadron and Lepton-Hadron Collisions

Kniehl

2003

Hadron Collider Physics 2002

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Summary. We review a recent global analysis of inclusive single-charged-hadron production in high-energy colliding-beam experiments, which is performed at nextto-leading order (NLO) in the parton model of quantum chromodynamics endowed with nonperturbative fragmentation functions (FFs). Comparisons of pp data from CERN SppS and the Fermilab Tevatron and γp data from DESY HERA with the corresponding NLO predictions allow for quantitative tests of the scaling violations in the FFs and their universality. We emphasize the potential of new measurements at the Tevatron to place tight constraints in the large-x region and on the gluon FF, complementary to those from e + e − data, which are indispensible in order to reliably predict the π 0 background for the H → γγ signal of the intermediate-mass Higgs boson at the Tevatron and the CERN LHC. Adopting a similar theoretical framework for b-hadron production, we show that the notorious excess of the Tevatron data over existing theoretical calculations can be ascribed, at sufficiently large values of pT , to nonperturbative fragmentation effects inadequately included previously.

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