Global Analysis Of Fragmentation Functions For Protons And Charged Hadrons

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Unpolarized and Polarized Fragmentation Functions

UNPOLARIZED AND POLARIZED FRAGMENTATION FUNCTIONS 3 Table I. { Main features of global t analyses DSS [27, 28, 29], HKNS [26], and AKK08 [30]: data sample, kinematic range covered, technique for

An analysis of charged-hadron fragmentation functions

An analysis of charged-hadron fragmentation functions including Tevatron and LHC data Valerio Bertone NIKHEF and VU Amsterdam DIS 2018 April 19, 2018, Kobe (Japan)

Fragmentation function measurements with the Belle detector

various global fits, but explicit measurements are not available so far. Furthermore, the published results on the spin de-pendent fragmentation function measurements2) are in the process to be augmented to also access the flavor dependence by not only concentrating on charged pi-ons, but also on charged kaons and neutral mesons as

STAR results on longitudinal spin dynamics

- via TPC pT for charged hadrons+EMC ET for e-m showers 2) Trigger used in this analysis - High Tower: ET > 2.4 GeV deposited in one tower (Δη x Δφ ) = (0.05 x 0.05) + additional requirement of BBC coincidence. 1) Jets reconstruction - midpoint cone algorithm (Tevatron II) seed energy = 0.5 GeV, cone angle R = 0.4 in η−φ

1 Introduction

points) and negative (black points) hadrons as functions of x, z and ph T from the combined 2007 and 2010 proton data. for charged hadrons from 2010 data is shown in Fig. 1 (left). As can be seen, the x range goes from x ≃ 3 10−3 to x ≃ 0.7 with relatively large Q2 values in the valence region.

CERN-TH-2017-122 Nikhef/2016-047

We present NNFF1.0, a new determination of the fragmentation functions (FFs) of charged pions, charged kaons, and protons/antiprotons from an analysis of single-inclusive hadron pro-duction data in electron-positron annihilation. This determination, performed at leading, next-

Charged hadron fragmentation functions from collider data

poorly known gluon fragmentation, therefore their inclusion in a fit is expected to provide a stringent constraint on this distribution. The ppdata is included by means of Bayesian reweighting [38,39]. The result, NNFF1.1h, is a new set of FFs for unidentified charged hadrons from a global analysis of SIA and ppdata. The paper is organised as


kaons and protons. The RCP shows a suppression at forward rapidities for all species, which is consistent with what we have seen before for charged hadrons [7]. As has been discussed in Ref. [8], the pheripheral Au+Au collisions are not equivalent to the p+p collisions, i.e. the RCP for 0 10%/40 60% is more

Measurement of single transverse spin asymmetry via single

Graduate Theses and Dissertations Iowa State University Capstones, Theses and Dissertations 2010 Measurement of single transverse spin asymmetry via single hadrons and di-hadron correlations in the

Measurement of charged-hadron production in Z-tagged jets

QCD calculations utilize fragmentation functions to determine cross-sections of hadron production from scattered partons. Fragmentation functions describe the probability for a particular parton to transform into a particular hadron [1{3]. Several global ts to experimental data have provided parameterized fragmentation functions (see e.g. Ref. [4]

Global QCD Analysis of Fragmentation Functions and Possible

QCD framework for fragmentation definition of FFs, relevant processes, limitations II.current status of fragmentation fcts. DSS global analysis prejudices, results, issues, comparison with other fits, uncertainties, future directions III.medium modification pragmatic approach idea & ansatz, analysis of eN & dAu data, 1st results

Run Group E

A global extraction of the jet transport coefficient in cold nuclear matter. Peng Ru, Zhong-Bo Kang, Enke Wang, Hongxi Xing, Ben-Wei Zhang arXiv:1907.11808 [hep-ph] (2019) Initial conditions for the modified evolution of fragmentation functions in the nuclear medium Ning-Bo Chang, Wei-Tian Deng, and Xin-Nian Wang Phys. Rev. C 89, 034911 (2014)

Charge and hadron type separated meson multiplicities at Hermes

tation of quarks into nal state hadrons and will con-tribute valuable input for the extraction of fragmentation functions using QCD ts. The comparison of the results FIG. 2. Comparison of the vector-meson-corrected multiplicities measured on the proton for various hadrons with leading order calculations.

Charm jets as a probe for strangeness at the future Electron

Comparing the LO vs NLO calculations for the charged-current charm-production structure functions (e.g., FW− 2c) indicates that the NLO corrections are generally relatively mild, especially in the large-x region of relevance to the measurements discussed in this study [36,37]. This is similar to the situation for Monte Carlo generated x, Q

Fragmentation Functions measurement at COMPASS

longitudinal spin structure. Our current knowledge of single hadron fragmentation functions is based on existing global QCD analyses mainly driven by high precision measurements from single inclusive electron-positron annihilation into charged hadrons, for which the cross section has no

Global Analysis ofFragmentation Functions forEtaMesons

ons, kaons, protons, and residual charged hadrons from [5, 6], but allowing for different normalizations, leads to fits of comparable quality with only two additional free parameters. The best fit is obtained for the charm and bottom FFs from an analysis of residual charged hadrons [6], i.e., hadrons other than pions, kaons, and protons, and

arXiv:2107.13972v1 [nucl-ex] 29 Jul 2021

fragmentation contribution, but limited by statistics. On the other hand, jet and charged pion production have more statistics, but include more hard processes and hadronization effects. I will present the recent measurements of direct photon, jet and charged pion ALLs at PHENIX and show their complementary roles in extracting the gluon spin

Constraining Quark Transversity through Collins Asymmetry

given to fragmentation hadron 6 Nucl.Phys.Proc.Suppl. 191 98‐107 009 Measured at Belle and in SIDIS and extracted in a Global Analysis. Relatively large Increasing with fragmentation z. Interference Fragmentation Functions another Chiral‐odd FF. Measurement

Flavor Decomposition of Nucleon Spin via polarized SIDIS

NLO global analysis of fragmentation functions: DSS2007 (PRD 75, 114010) Considerable and growing evidence for QPM interpretation of SIDIS data Still need to verify for e.g. JLab 12 (deferred PR-10-010) using ideally CLAS12

INPC2019 Drachenberg forPDF

scattering of protons on ultra thin carbon ribbon targets several times during a fill, were used to measure the polarization of each beam. These polarimeters were calibrated with a polarized hydro-gen gas jet target [37]. 3. Analysis The azimuthal angles in the scattering system used to calculate

Status of BRAHMS Analyses - BNL

Precision studies of identified hadrons at high rapidity and comparison to pQCD. Demonstrates applicability at high y. Provides important input to determination of fragmentation functions, that has been used ! PRL 98,252001 (2007) Recently deFlorian, Sassot and Stratman performed a global fit including the pi and kaon data from Brahms at high

PHYSICAL REVIEW D 103, 054045 (2021)

lepton and hadron colliders requires a precise determination of fragmentation functions (FFs) of light and heavy charged hadrons from a global QCD analysis with great accuracy. We describe a simultaneous determination of unpolarized FFs of charged pions, charged kaons and protons/antiprotons from single-

Dihadron Fragmentation Functions In Proton-Proton Collisions

1.22 Comparisons between the ratio of the dihadron fragmentation function to the single fragmentation functions of the leading hadron (D/S) and the fragmentation function of the associated hadron (S). The dashed lines are for the gluon and the solid lines are for the quark fragmen-tation function. The dot-dashed lines represent a rescaled quark

A determination of the fragmentation functions of pions

the fragmentation functions (FFs) of charged pions, charged kaons, and protons/antiprotons from an analysis of single-inclusive hadron production data in electron positron anni-hilation. This determination, performed at leading, next-to-leading, and next-to-next-to-leading order in perturbative


Collaboration for the production of charged hadrons inside tagged jets produced in proton-proton collisions at the LHC. We use as input the TMD fragmentation functions extracted by the INFN-NINPHA Pavia unit from the global t of SIDIS, Drell-Yan, and Z-boson production experimental data. Finally, we brie

Unintegrated gluon distribution and soft pp col- lisions at LHC

of this distribution to analysis of the e p DIS allows us to get the results which do not contradict the H1 and ZEUS data on the structure functions at low x. So, the connection between the soft processes at LHC and low-x physics at HERA is found. 1 Introduction As is well known, hard processes involving incoming protons, such as deep-inelastic


hadrons to inclusive charged hadrons from hadrons to the inclusive unidentified light charged hadron fragmentation functions (FFs) at next-to-leading extracted from a global QCD analysis

Status of Fragmentation Functions and Polarized Parton Densities

global analysis. 15 earlier ideas: Berger, Graudenz, 1st global QCD analysis of fragmentation functions protons, charged hadrons untagged & flavor tagged

The DSS Global QCD Analysis of Fragmentation Functions

Global analysis of fragmentation functions for pions and kaons and their uncertainties, Phys. Rev. D75 (2007) 114010 (hep-ph/0703242) Global analysis of fragmentation functions for protons and charged hadrons, Phys. Rev. D76 (2007) 074033 (arXiv:0707.1506 [hep-ph]) Fortran codes of the DSS fragmentation fcts are available upon request

Recent COMPASS results on Transverse Spin and Momentum

metry as functions of x, as clearly shown in Fig. 2 (left). First, the Collins asymmetries for positive and for negative hadrons have the same magnitude but opposite sign, as can be explained assum-ing hu 1 h d 1 and opposite sign for favoured and unfavoured Collins fragmentation functions [19].

Transverse Spin Structure of the Nucleon

charged and neutral hadrons have been observed in pp scattering in the forward region of the polarized proton beam by the BRAHMS, PHENIX, and STAR experiments (23 29). In addi-tion, high-energy lepton scattering experiments, including HERMES at DESY, COMPASS at

Mireille Muhoza and Collin McCauley arXiv:1810.01002v1 [nucl

hadrons before ever being detected as free particles. They are essential manifesta-tions of Quantum Chromodynamics (QCD) and con nement. The ensuing dramatic improvement in the knowledge of fragmentation functions will be an important in-gredient in the global analysis of the nucleon structure from semi-inclusive Deep-Inelastic-Scattering and


hadrons due to color confinement, knowledge of proton structure and hadron fragmentation is required. In the following, the example of deep inelastic lepton nucleon scattering will be used to formally define parton momentum distribution functions and also helicity and transversity distribution functions. According to the optical

Quark Matter 2004 Poster Abstracts

Spectra 1 Sangsu Ryu, Multiplicity Measurement From dAu Collisionsat sNN GeV 200 Affiliation: PHENIX collaboration Co-authors/Collaboration: The PHENIX Multiplicity Vertex Detector (MVD) consists of two concentric layers of silicon


Jul 21, 2020 results in the modi cation of fragmentation functions and softening of the particle spectra. The modi cation of the spectra due to the medium can be quanti ed by the uclear modi cation factor , de ned as the ratio of the yield in heavy ion collisions (A+B) to the yield in p+p collisions scaled by the number of binary collisions (N coll

Extraction of first tranverse moment of Sivers and g1T PDFs

Parton Distribution and Fragmentation Function PDF: Probability distribution for quark avor q to have momentum fraction x at given Q2 General description: 3 valence quarks and sea of quarks FF:Probability density of fragmented mesons Function of z and Q2(x), so commonly integrate out z dependence Use LHAPDF and FF library (C++ and Fortran based)

The Rapidity Dependence of High p Suppression in Au+Au

and yields of charged hadrons, as well as identi ed pions, kaons, protons and their antiparticles produced in Au+Au and p+p collisions at p s NN=200 GeV with the BRAHMS experiment at RHIC. BRAHMS has the unique capability to measure particle production, not only at midrapidity, but over a wide p T and rapidity range.

Belle Preprint KEK Preprint

arXiv:1509.00563v2 [hep-ex] 25 Oct 2015 Belle Preprint 2015-12 KEK Preprint 2015-21 Inclusive cross sections for pairs of identified light charged hadrons and for single