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Zheng, H. W.; Pérez, P.; Auchincloss, P.; Blanis, D.; Bodek, A.; Budd, H. S.; Eno, S. C.; Fry, C. A.; Harada, Hiroyuki; Ho, Y.; Kim, Y. K.; Kumita, T.; Mori, T.; Olsen, S. L.; Shaw, N. M.; Sill, A.; Thorndike, E. H.; Ueno, K.; Imlay, R.; Kirk, P.; Lim, J.; McNeil, R. R.; Metcalf, W.; Myung, S. S.; Cheng, C. P.; Gu, Ping; Li, J.; Li, Y. K.; Ye, M. H.; Zhu, Y. C.; Abashian, A.; Gotow, K.; Hu, K. P.; Low, E. H.; Mattson, M. E.; Piilonen, L. E.; Sterner, K. L.; Lusin, S.; Rosenfeld, C.; Wang, A. T.M.; Wilson, Stephen; Frautschi, M.; Kagan, H.; Kass, R.; Trahern, C. G.; Breedon, R.; Kim, G. N.; Ko, W.; Lander, R.; Maeshima, K.; Malchow, R.; Smith, J.; Stuart, D.; Abe, Kazuo; Fujii, Y.; Higashi, Y.; Kim, S. K.; Kurihara, Y.; Maki, A.; Nozaki, T.; Omori, T.; Sagawa, H.; Sakai, Y.; Sugimoto, Yasuhiro; Takaiwa, Y.; Terada, S.; Walker, R.; Kajino, F.; Perticone, D.; Poling, R.; Thomas, T. L.; Ishi, Y.; Miyano, K.; Miyata, H.; Sasaki, Takashi; Yamashita, Y.; Bacala, A.; Liu, J.; Park, I. H.; Sannes, F.; Schnetzer, S.; Stone, R.; Vinson, J.; Kobayashi, S.; Murakami, Akira; Kang, J. S.; Kim, H. J.; Lee, Moo Hyun; Han, Dong; Kim, E. J.; Son, D. C.; Kojima, Takayuki; Matsumoto, S.; Tanaka, R.; Yamagishi, Yoshio; Yasuda, T.; Ishizuka, T.; Ohta, Kouji

doi:10.1103/physrevd.42.737

Cited by 44 publications

(12 citation statements)

References 34 publications

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“…We noted that we could not get good agreement with the jet data from OPAL [51] over the entire kinematic range of 10 −5 < y cut < 0.5. Since we were interested in studying [41][42][43][44][45][46][47][48][49][50] and LEP averages from [22]) and multiplicity of jets [51,28] the transition between jets and hadrons, we chose our parameters so that they gave a particularly good description of the low y cut regime and the hadron multiplicity as well as the very large y cut region. In Table 1 we illustrate the dependence of the hadron and jet multiplicity on the parameters.…”

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confidence: 99%

QCD explanation of oscillating hadron and jet multiplicity moments

Buican¹,

Forster²,

Ochs³

2003

Eur. Phys. J. C

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Ratios of multiplicity moments, H q (cumulant over factorial moments K q /F q ), have been observed to show an oscillatory behaviour with respect to order, q. Recent studies of e + e − annihilations at LEP have shown, moreover, that the amplitude and oscillation length vary strongly with the jet resolution parameter y cut . We study the predictions of the perturbative QCD parton cascade assuming low nonperturbative cut-off (Q 0 ∼ Λ QCD ∼ few 100 MeV) and derive the expectations as a function of the cms energy and jet resolution from threshold to very high energies. We consider numerical solutions of the evolution equations of gluodynamics in Double Logarithmic and Modified Leading Logarithmic Approximations (DLA, MLLA), as well as results from a parton MC with readjusted parameters. The main characteristics are obtained in MLLA, while a more numerically accurate description is obtained by the MC model. A unified description of correlations between hadrons and correlations between jets emerges, in particular for the transition region of small y cut .

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confidence: 99%

QCD explanation of oscillating hadron and jet multiplicity moments

Buican¹,

Forster²,

Ochs³

2003

Eur. Phys. J. C

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“…The charged particle multiplicity (the total number of charged particles produced in an event) in positron-electron annihilation into multi-hadron final states is one of the most fundamental observables in the fragmentation process during which quark-antiquark pairs are produced [1][2][3][4][5]. For example, the interactions among the elementary particles are represented by Feynman diagrams such as those in the following Figure [1].…”

Section: ( )mentioning

confidence: 99%

“…For example, the interactions among the elementary particles are represented by Feynman diagrams such as those in the following Figure [1]. The − + e e annihilation process is well understood by the creation of a quark-antiquark pair, branching of these pairs in accordance to perturbative quantum chromo-dynamics (QCD) and finally hadronization [5].…”

Section: ( )mentioning

confidence: 99%

“…[12][13][14][15][16][17][18][19][20]) and theoretically [21][22][23][24]. However, due to the lacking of fundamental theory, a number of phenomenological models have been proposed to characterize the charged-particle multiplicity in high energy hadron processes [1,9], starting with early investigations by W. Heisenberg and E. Fermi [19,20]. Furthermore, because of the shortage of the fundamental theory to describe the experimental data on multiplicity distribution, the investigation of charged particles production in Empirical Equation Using GMDH Methodology for the Charged Particles...…”

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confidence: 99%

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Empirical Equation Using GMDH Methodology for the Charged Particles Multiplicity Distribution in Hadronic Positron-Electron Annihilation

El‐Dahshan

El-Bakry

2017

EEJP

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Multiplicity distributions are the most general characteristics of hadronic multiparticle production processes. The multiplicity distribution of hadronic positron-electron annihilation is investigated using group method data handling (GMDH) technique up to the highest available center of mass energy ( s ) (from 14 GeV to 206 GeV). We have obtained an empirical physical equation for the multiplicity distribution as a function of s and the charged multiplicity (n ch ) i. e.

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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

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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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Charged-particle multiplicities ine+e−annihilations ats

Cited by 44 publications

References 34 publications

QCD explanation of oscillating hadron and jet multiplicity moments

QCD explanation of oscillating hadron and jet multiplicity moments

Empirical Equation Using GMDH Methodology for the Charged Particles Multiplicity Distribution in Hadronic Positron-Electron Annihilation

Multiplicity studies and effective energy in ALICE at the LHC

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