Hadron production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>annihilation at<i>√s =29</i>GeV

Derrick, M.; Fernández, E.; Gan, K. K.; Fries, Rainer J.; Hyman, L.; Kooijman, P.; Loos, J.S.; Musgrave, B.; Price, L. E.; Schlereth, J. L.; Sugano, K.; Weiss, J. M.; Wood, D.E.; Baranko, G.; Blockus, D.; Brabson, B.; Daigo, M.; Forden, G. E.; Gray, S. W.; Jung, C. K.; Neal, H. A.; Ogren, H. O.; Rust, D. R.; Valdata‐Nappi, M.; Akerlof, C.; Bonvicini, G.; Chapman, J.; Errede, D.; Harnew, N.; Kesten, P.; Kooijman, S.A.L.M.; Meyer, D. I.; Nitz, D.; Rubin, D.; Seidl, A. A.; Thun, R. P.; Trinko, T.; Willutzky, M.; Abachi, S.; Baringer, P.; Beltrami, I.; Bylsma, B.; Bonte, R. De; Koltick, D.; Loeffler, F.J.; Low, E. H.; Mallik, U.; McIlwain, R. L.; Miller, D. H.; Ng, C. R.; P, Ong; Rangan, L.K.; Shibata, E. I.; Wilson, Robert S.; Cork, B.; Keller, L.; Va’vra, J.

doi:10.1103/physrevd.35.2639

Cited by 54 publications

(20 citation statements)

References 31 publications

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“…14.0 1.82 [8] 14.8 2.65 [9] 21.5 0.69 [9] 22.0 0.99 [8] 29.0 1.27 [10] 0.40 [11] 0.16 [12] 33.0 0.82 [13] 34.0 1.33 [8] 34.5 1.89 [9] 35.0 0.30 [9] 1.64 [14] 42.6 1.02 [9] 58.0 0.01 [15] 91.2 0.33 [16] are calculated from our FF set for K 0 S production in the graphs on the left hand side and our FF set for Λ production in the graphs on the right hand side. The curves of the same label from the K ± FF set in Ref.…”

Section: Discussionmentioning

confidence: 99%

Fragmentation functions for KS0 and Λ with complete quark flavour separation

2006

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We present new sets of next-to-leading order fragmentation functions for the production of K 0 S and Λ particles from the gluon and from each of the quarks, obtained by fitting to all relevant data sets from e + e − annihilation. The individual light quark flavour fragmentation functions are constrained phenomenologically for the first time by including in the data the light quark tagging probabilities measured by the OPAL Collaboration.

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Section: Discussionmentioning

confidence: 99%

Fragmentation functions for KS0 and Λ with complete quark flavour separation

2006

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“…In our analysis we shall use all available K ± and K 0 S production data presented by the different collaborations TASSO [10]- [11], MARK II [12], TPC [13], HRS [14], CELLO [15], TOPAZ [16], ALEPH [17], DELPHI [18], OPAL [19]- [20] and SLD [21] at different values of s.…”

Section: Introductionmentioning

confidence: 99%

Nonsinglet kaon fragmentation function frome+e−kaon production

Albino

Christova

2010

Phys. Rev. D

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We perform fits to the available charged and neutral kaon production data in e + + e − → K + X,, and determine the non-singlet combination of kaon fragmentation functions Din a model independent way and without any correlations to the other fragmentation functions. Only nuclear isospin invariance is assumed. Working with non-singlets allows us to include the data at very low momentum fractions, which have so far been excluded in global fits, and to perform a first NNLO fit to fragmentation functions. We find that the kaon non-singlet fragmentation function at large z is larger than that obtained by the other collaborations from global fit analysis and differs significantly at low z.

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“…The selection of the actual data sample was based on a set of conditions placed both upon the individual chargedparticle tracks and upon the track pairs [2]. The cross section s/P(do /dz) was calculated, using an adjusted value of &s =28.3 GeV to take into account radiative corrections.…”

Section: -mentioning

confidence: 99%

“…[l], the techniques used to select A's have been summarized in Ref. [2] and previous results, based on an integrated luminosity of 256+8 pb have been reported in Ref. [3].…”

Section: Introductionmentioning

confidence: 99%

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Study of inclusiveΛproduction ine+e−annihilations at 29 GeV

Geld

Neal²,

Akerlof³

et al. 1992

Phys. Rev. D

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Cross sections are presented for the inclusive production of A hyperons in electron-positron annihilations at &s =29 GeV based on the full 291-pb sample of data taken in the High Resolution Spectrometer experiment at the SLAC e+e storage ring PEP. These results, and the associated correlation analyses, are consistent with the Lund model predictions with the strange diquark suppression ratio 5 fixed at 0.59+0.10+0.18, as compared to the standard Lund value of 0.32. The A multiplicity has been found to be 0. 182+0.020 per event. The opposite-strangeness multiplicity (nAA) has been measured to be 0.046+0.020, whereas the like-strangeness multiplicity (n~~+ ") is 0.009+0.028. A strong correlation is found between A's and A 's; when one is found in an event, the other is found in the same event with a probability that exceeds 50&o. PACS number(s): 13.65.+i, 13.87.Fh, 14.20 The baryons most accessible for study are the proton and lambda hyperon. Complicating the analysis of the production of these particles, however, is the fact that they arise as products of e+e annihilations both as a result of fragmentation processes and as a result of the decays of other baryonic states.In present fragmentation models baryons are produced via the creation of diquark pairs which then combine with a neighboring quark to produce the baryon. The Lund model parameter that governs the ratio of the baryonic to mesonic production rates is (qq/q), specifying how much more difficult it is to produce a diquark pair than a quark pair. In the inclusive production of A' s the strangeness quanta can come either from the quark or the diquark. To describe both the E and A inclusive production data, two additional parameters are required: A variant of this simple parametrization for producing baryons is the "popcorn model, " in which the remnant quarks left over after the quark pair and diquark pair produce a baryon contribute to the production of intermediate mesons and other baryons, rather than directly forming the counterpart antibaryon. This effect is illustrated in Fig. 1 [6 Their general overall agreement with available data is impressive and their A multiplicity prediction of 0.18 compares well with the value to be presented here.In this paper we utilize the large sample of A and A events to extract the 5 parameter and to examine the dominance of the simple Lund fragmentation mechanism through an analysis of the production rates of likestrangeness and opposite-strangeness A (A) pairs.The HRS consisted of an inner and outer driftchamber system which permitted charged-particle track positions to be determined to 200 pm over a radial distance of 1.89 m, and a barrel shower system which had an

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Hadron production ine+e−annihilation at√s =29GeV

Cited by 54 publications

References 31 publications

Fragmentation functions for KS0 and Λ with complete quark flavour separation

Fragmentation functions for KS0 and Λ with complete quark flavour separation

Nonsinglet kaon fragmentation function frome+e−kaon production

Study of inclusiveΛproduction ine+e−annihilations at 29 GeV

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