Jet production and fragmentation ine + e ? annihilation at 12?43 GeV

Althoff, Matthias; Braunschweig, W.; Kirschfink, F. J.; Lübelsmeyer, K.; Martyn, H. U.; Peise, G.; Rimkus, J.; Rosskamp, P.; Sander, H. G.; Schmitz, D.; Siebke, H.; Wallraff, W.; Fischer, H. M.; Hartmann, H.; Hillen, W.; Joksch, A.; Knop, G.; Köpke, L.; Kolanoski, H.; Kück, H.; Mertens, Volker; Wedemeyer, R.; Wermes, N.; Wollstadt, M.; Eisenberg, Y.; Gather, K.; Hultschig, H.; Joos, P.; Koch, W.; Kötz, U.; Kowalski, H.; Ladage, A.; Löhr, B.; Lüke, D.; Mättig, P.; Notz, D.; Nowak, R. J.; Pyrlik, J.; Quarrie, D. R.; Rushton, M.; Schütte, W.; Trines, D.; Wolf, G.; Xiao, Ch.; Fohrmann, R.; Hilger, E.; Kracht, T.; Krasemann, H. L.; Leu, P.; Lohrmann, E.; Pandoulas, D.; Poelz, G.; Pösnecker, K. U.; Wiik, B. H.; Beuselinck, R.; Binnie, D. M.; Campbell, A. J.; Dornan, P. J.; Foster, B.; Garbutt, D. A.; Jenkins, C.; Jones, T. D.; Jones, W. G.; McCardle, J.; Sedgbeer, J. K.; Thomas, J. P.; Abdullah, Wan Ahmad Tajuddin Wan; Bell, K. W.; Bowler, M. G.; Bull, P.; Cashmore, R. J.; Clarke, P. E.L.; Devenish, R. C. E.; Grossmann, P.; Hawkes, C. M.; Lloyd, S. L.; Salmon, G.L.; Wyatt, T. R.; Youngman, C.; Forden, G. E.; Hart, J. C.; Harvey, J.; Hasell, D.; Proudfoot, J.; Saxon, D. H.; Woodworth, P.L.; Barreiro, F.; Dittmar, M.; Holder, M.; Neumann, B.; Duchovni, E.; Karshon, U.; Mikenberg, G.; Mir, R.; Revel, D.; Ronat, E.; Shapira, A.; Yekutieli, G.; Baranko, G.; Barklow, T.; Caldwell, A.; Cherney, M.; Izen, J. M.; Mermikides, M.; Rudolph, G.; Strom, D.; Venkataramania, H.; Wicklund, E.; Wu, S. L.; Zobernig, G.

doi:10.1007/bf01547419

Cited by 199 publications

(16 citation statements)

References 50 publications

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“…On the other hand, for NSD collisions, scaling was still found to be present [27], suggesting that diffractive processes might also play a role in KNO scaling violations. In e + e − collisions, at √ s from 5 to 34 GeV, KNO scaling was found to hold within ±20% [28]. In proton-antiproton collisions at the CERN collider ( √ s = 200, 546 and 900 GeV), KNO scaling was found to be violated for NSD collisions in full phase space [29][30][31].…”

Section: Introductionmentioning

confidence: 94%

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2017

Eur. Phys. J. C

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A detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton-proton collisions, at √ s = 0.9, 2.36, 2.76, 7 and 8 TeV, in the pseudorapidity range |η| < 2, was carried out using the ALICE detector. Measurements were obtained for three event classes: inelastic, non-single diffractive and events with at least one charged particle in the pseudorapidity interval |η| < 1. The use of an improved track-counting algorithm combined with ALICE's measurements of diffractive processes allows a higher precision compared to our previous publications. A KNO scaling study was performed in the pseudorapidity intervals |η| < 0.5, 1.0 and 1.5. The data are compared to other experimental results and to models as implemented in Monte Carlo event generators PHOJET and recent tunes of PYTHIA6, PYTHIA8 and EPOS.

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Section: Introductionmentioning

confidence: 94%

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2017

Eur. Phys. J. C

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“…Some direct access to the transverse-momentum dependence of the polarized Collins FFs has been achieved by BABAR [10,15], but little is known about the transverse-momentum dependence of unpolarized fragmentation functions. Some old data for inclusive, unidentified hadron cross sections from e þ e − annihilation does exist [16,17]. An attempt at fitting these data was made, including the scale dependence [18], but the precision of the data is very limited.…”

Section: Introductionmentioning

confidence: 99%

Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e+e− annihilation at s=10.58<

Seidl¹,

Adachi²,

Ahn³

et al. 2019

Phys. Rev. D

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We report measurements of the production cross sections of charged pions, kaons, and protons as a function of fractional energy, the event-shape variable called thrust, and the transverse momentum with respect to the thrust axis. These measurements access the transverse momenta created in the fragmentation process, which are of critical importance to the understanding of any transverse-momentum-dependent distribution and fragmentation functions. The low transverse-momentum part of the cross sections can be well described by Gaussians in transverse momentum as is generally assumed but the fractional-energy dependence is nontrivial and different hadron types have varying Gaussian widths. The width of these Gaussians decreases with thrust and shows an initially rising, then decreasing fractional-energy dependence. The widths for pions and kaons are comparable within uncertainties, while those for protons are significantly narrower. These single-hadron cross sections and Gaussian widths are obtained from a 558 fb −1 data sample collected at the ϒð4SÞ resonance with the Belle detector at the KEKB asymmetric-energy e þ e − collider.

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“…First attempts for the latter using among others the rather limited data from TASSO [37,38] were recently presented in Ref. [39].…”

Section: Single-hadron Productionmentioning

confidence: 99%

Measurements of fragmentation functions and implications for semi-inclusive deep-inelastic scattering

Schnell¹

2018

Proceedings of QCD Evolution 2017 — PoS(QCDEV2017)

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In this talk we will briefly review the present status of fragmentation function measurements with a focus on the more recent measurements of Collins-function related as well as of polarizationaveraged single-and di-hadron fragmentation. We will further discuss limitations in the analysis of dihadron-fragmentation data arising through an incomplete integration of the differential cross section imposed by experimental constraints. In particular, we show that the usual application of momentum requirements together with integration over the polar angle of the hadrons in the di-hadron center-of-mass frame leads to a presently uncontrollable mix of various partialwave components of the di-hadron fragmentation function, prohibiting precision extractions of di-hadron fragmentation functions from e + e − annihilation, semi-inclusive deep-inelastic scattering, or proton-proton collision data.

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Jet production and fragmentation ine + e ? annihilation at 12?43 GeV

Cited by 199 publications

References 50 publications

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e+e− annihilation at s=10.58<

Measurements of fragmentation functions and implications for semi-inclusive deep-inelastic scattering

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