Pion and Kaon multiplicities in heavy quark jets from e+e− annihilation at 29 GeV

Aihara, H.; Alston‐Garnjost, M.; Avery, R. E.; Bakken, J. A.; Barbaro‐Galtieri, A.; Barker, A. R.; Barnes, A. V.; Barnett, B. A.; Bauer, D. A.; Bengtsson, Hans-Uno; Bintinger, D.; Blumenfeld, B.; Bobbink, G. J.; Bolognese, T.; Bross, A.; Buchanan, C.; Buijs, A.; Caldwell, D. O.; Chien, C. Y.; Clark, A. R.; Cowan, G.; Crane, D.; Dahl, O. I.; Derby, K. A.; Eastman, J. J.; Edberg, T. K.; Eberhard, Philippe; Eisner, A. M.; Enomoto, R.; Erné, F.C.; Fujii, T.; Gary, J. W.; Gorn, W.; Hauptman, J. M.; Hofmann, W.; Huth, J. E.; Hylen, J.; Kamae, T.; Kaye, H. S.; Kees, K. H.; Kenney, Robert W.; Kerth, L. T.; Ko, W.; Koda, R. I.; Kofler, R.; Kwong, K. K.; Lander, R.; Langeveld, W. G.J.; Layter, J. G.; Linde, F.L.; Linsey, C. S.; Loken, S.; Lu, A.; Lu, X. Q.; Lynch, G.; Madansky, L.; Madaras, R. J.; Maeshima, K.; Magnuson, B. D.; Marx, J. N.; Masek, G.; Mathis, L.; Matthews, John; Maxfield, S. J.; Melnikoff, S. O.; Miller, E. S.; Moses, W.W.; McNeil, R. R.; Némethy, P.; Nygren, D. R.; Oddone, P. J.; Paar, H. P.; Park, D. A.; Park, S. K.; Pellett, D.; Pevsner, A.; Pripstein, M.; Ronan, M. T.; Ross, R. R.; Rouse, F.; Schwitkis, K. A.; Sens, J.C.; Shapiro, G.; Shapiro, M.; Shen, B. C.; Slater, W.; Smith, J. R.; Steinman, J. S.; Stevenson, M. L.; Stork, D. H.; Strauss, M. G.; Sullivan, M. K.; Takahashi, Tohru; Thompson, James R.; Toge, N.; Toutounchi, S.; Tyen, R. van; Uitert, B. van; VanDalen, G. J.; Wetters, R. F. van Daalen; Vernon, W.; Wagner, W.; Wang, E. M.; Wang, Y. X.; Wayne, M.; Wenzel, W. A.; White, J. T.; Williams, M. C. S.; Wolf, Z. R.; Yamamoto, H.; Yellin, S.; Zeitlin, C.; Zhang, W. M.

doi:10.1016/0370-2693(87)90586-7

Cited by 65 publications

(21 citation statements)

References 25 publications

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“…Based on precise data on inclusive hadron production in hard scattering processes [2][3][4][5][6][7][8][9], empirical fragmentation functions have been extracted, and their behavior under scale evolutions has been investigated in detail [10][11][12]. It is reasonable to expect that in the near future an understanding of the fragmentation functions will be attained, which is as precise as the present knowledge on quark distribution functions.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo simulations of hadronic fragmentation functions using the Nambu–Jona-Lasinio–jet model

2011

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The recently developed Nambu-Jona-Lasinio (NJL) -jet model is used as an effective chiral quark theory to calculate the quark fragmentation functions to pions, kaons, nucleons, and antinucleons. The effects of the vector mesons ρ, K * , and φ on the production of secondary pions and kaons are included. The fragmentation processes to nucleons and antinucleons are described by using the quark-diquark picture, which has been shown to give a reasonable description of quark distribution functions. We incorporate effects of next-to-leading order in the Q 2 evolution, and compare our results with the empirical fragmentation functions.

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Section: Introductionmentioning

confidence: 99%

Monte Carlo simulations of hadronic fragmentation functions using the Nambu–Jona-Lasinio–jet model

2011

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“…In order to tune the shower and light quark hadronization parameters we used data on jet rates and event shapes for centre-of-mass energies between 14 and 44 GeV [40][41][42][43], at LEP1 and SLD [42][43][44][45][46][47] and LEP2 [42,43,46,47], particle multiplicities [44,45] and spectra [44,45,[48][49][50][51][52][53][54][55][56][57][58][59][60] at LEP 1, identified particle spectra below the Υ(4S) from Babar [61], the charged particle multiplicity and distributions from [62][63][64][65][66][67] for centre-of-mass energies between 14 and 61 GeV, the charged particle multiplicity [68,69] and particle spectra [68,70,71] in light quark events at LEP1 and SLD, the charged particle multiplicity in light quark events at LEP2 [72,73], the cha...…”

Section: Tuningmentioning

confidence: 99%

“…The hadronization parameters for charm quarks were tuned using the charged multiplicity in charm events at HRS [64], SLD [69] and LEP2 [72,73], the light hadron spectra in charm events at LEP1 and SLD [68,70,71], the multiplicities of charm hadrons at the Z-pole [44,77], and charm hadron spectra below the Υ(4S) [80][81][82] and at LEP1 [83].…”

Section: Tuningmentioning

confidence: 99%

“…The hadronization parameters for bottom quarks were tuned using the charged multiplicity in bottom events at HRS [64], SLD [69] and LEP2 [72,72,73], the light hadron spectra and event shapes in bottom events at LEP1 and SLD [43,68,70,71,79], the multiplicities of charm and bottom hadrons at the Z-pole [44,77], charm hadron spectra at LEP1 [50,83] and the bottom fragmentation function measured at LEP1 and SLD [84][85][86][87].…”

Section: Tuningmentioning

confidence: 99%

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Logarithmic accuracy of angular-ordered parton showers

Bewick

Ravasio

Richardson

et al. 2020

J. High Energ. Phys.

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We study the logarithmic accuracy of angular-ordered parton showers by considering the singular limits of multiple emission matrix elements. This allows us to consider different choices for the evolution variable and propose a new choice which has both the correct logarithmic behaviour and improved performance away from the singular regions. In particular the description of e + e − event shapes in the non-logarithmic region is significantly improved.

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“…It is well known that the average charged multiplicity in e + e − collisions follows a logarithmic dependence on the centre-of-mass energy √ s. Figure 1 shows a compilation of data from e + e − experiments [10,11,12,13,14,15,16,17,18,19,20,21] over a wide range of centre-of-mass energies (full black symbols), together with the result of a logarithmic fit to the measurements, indicated by the dashed line. As mentioned in section 1, the average charged multiplicity is characterized by a significantly different dependence on √ s if other initial states are considered.…”

Section: What We Learned From Previous Experimentsmentioning

confidence: 99%

Multiplicity studies and effective energy in ALICE at the LHC

et al. 2007

Self Cite

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Abstract. In this work we explore the possibility to perform "effective energy" studies in very high energy collisions at the CERN Large Hadron Collider (LHC). In particular, we focus on the possibility to measure in pp collisions the average charged multiplicity as a function of the effective energy with the ALICE experiment, using its capability to measure the energy of the leading baryons with the Zero Degree Calorimeters. Analyses of this kind have been done at lower centre-of-mass energies and have shown that, once the appropriate kinematic variables are chosen, particle production is characterized by universal properties: no matter the nature of the interacting particles, the final states have identical features. Assuming that this universality picture can be extended to ion-ion collisions, as suggested by recent results from RHIC experiments, a novel approach based on the scaling hypothesis for limiting fragmentation has been used to derive the expected charged event multiplicity in AA interactions at LHC. This leads to scenarios where the multiplicity is significantly lower compared to most of the predictions from the models currently used to describe high energy AA collisions. A mean charged multiplicity of about 1000 − 2000 per rapidity unit (at η ∼ 0) is expected for the most central P b − P b collisions at √ s N N = 5.5 TeV. PACS. PACS-key discribing text of that key -PACS-key discribing text of that key

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Pion and Kaon multiplicities in heavy quark jets from e+e− annihilation at 29 GeV

Cited by 65 publications

References 25 publications

Monte Carlo simulations of hadronic fragmentation functions using the Nambu–Jona-Lasinio–jet model

Monte Carlo simulations of hadronic fragmentation functions using the Nambu–Jona-Lasinio–jet model

Logarithmic accuracy of angular-ordered parton showers

Multiplicity studies and effective energy in ALICE at the LHC

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