Charged-particle production as a function of multiplicity and transverse spherocity in pp collisions at $\sqrt{s} =5.02$ and 13 TeV - INSPIRE

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Charged-particle production as a function of multiplicity and transverse spherocity in pp collisions at $\sqrt{s} =5.02$ and 13 TeV

ALICE

Collaboration

May 17, 2019

29 pages

Published in:

Eur.Phys.J.C 79 (2019) 10, 857

Published: Oct 17, 2019

e-Print:

1905.07208 [nucl-ex]

DOI:

10.1140/epjc/s10052-019-7350-y

Report number:

CERN-EP-2019-094

Experiments:

CERN-LHC-ALICE

View in:

reference search123 citations

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Abstract: (Springer)

We present a study of the inclusive charged-particle transverse momentum (

p_{\mathrm{T}}

) spectra as a function of charged-particle multiplicity density at mid-pseudorapidity,

\mathrm{d}N_{\mathrm{ch}}/\mathrm{d}\eta

, in pp collisions at

\sqrt{s}=5.02

and 13 TeV covering the kinematic range

|\eta |<0.8

and

0.15<p_{\mathrm{T}} <20

GeV/c. The results are presented for events with at least one charged particle in

|\eta |<1

(INEL

\,>0

). The

p_\mathrm{T}

spectra are reported for two multiplicity estimators covering different pseudorapidity regions. The

p_{\mathrm{T}}

spectra normalized to that for INEL

\,>0

show little energy dependence. Moreover, the high-

p_{\mathrm{T}}

yields of charged particles increase faster than the charged-particle multiplicity density. The average

{ p}_{\mathrm{T}}

as a function of multiplicity and transverse spherocity is reported for pp collisions at

\sqrt{s}=13

TeV. For low- (high-) spherocity events, corresponding to jet-like (isotropic) events, the average

p_\mathrm{T}

is higher (smaller) than that measured in INEL

\,>0

pp collisions. Within uncertainties, the functional form of

\langle p_{\mathrm{T}} \rangle (N_{\mathrm{ch}})

is not affected by the spherocity selection. While EPOS LHC gives a good description of many features of data, PYTHIA overestimates the average

p_{\mathrm{T}}

in jet-like events.

Note:

29 pages, 11 captioned figures, 4 table, authors from page 24, published version, figures at http://alice-publications.web.cern.ch/node/5287

charged particle: multiplicity
p p: scattering
charged particle: production
multiplicity: dependence
charged particle: yield
transverse momentum: momentum spectrum
rapidity: difference
energy dependence
momentum transfer
CERN LHC Coll

References(45)

Figures(12)

[1]

Experimental overview on small collision systems at the LHC

Constantin Loizides
(
- LBL, Berkeley
)

- Nucl.Phys.A 956 (2016) 200-207
•
e-Print:
- 1602.09138
•
DOI:
- 10.1016/j.nuclphysa.2016.04.022

[2]

Multiplicity Dependence of Pion, Kaon, Proton and Lambda Production in p-Pb Collisions at $\sqrt{s_{NN}}$ = 5.02 TeV

ALICE

Collaboration

•

Betty Bezverkhny Abelev
(
- LLNL, Livermore
)

et al.

- Phys.Lett.B 728 (2014) 25-38
•
e-Print:
- 1307.6796
•
DOI:
- 10.1016/j.physletb.2013.11.020

[3]

Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-Pb collisions at $\mathbf{\sqrt{{\textit s}_{\rm NN}}}$ = 5.02 TeV

ALICE

Collaboration

•

Jaroslav Adam
(
- Prague, Tech. U.
)

et al.

- Phys.Lett.B 760 (2016) 720-735
•
e-Print:
- 1601.03658
•
DOI:
- 10.1016/j.physletb.2016.07.050

[4]

Multiplicity dependence of light-flavor hadron production in pp collisions at $\sqrt{s}$ = 7 TeV

ALICE

Collaboration

•

Shreyasi Acharya
(
- Calcutta, VECC
)

et al.

- Phys.Rev.C 99 (2019) 2, 024906
•
e-Print:
- 1807.11321
•
DOI:
- 10.1103/PhysRevC.99.024906

[5]

Evidence for collectivity in pp collisions at the LHC

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 765 (2017) 193-220
•
e-Print:
- 1606.06198
•
DOI:
- 10.1016/j.physletb.2016.12.009

[6]

Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions

ALICE

Collaboration

•

Jaroslav Adam
(
- Prague, Tech. U.
)

et al.

- Nature Phys. 13 (2017) 535-539
•
e-Print:
- 1606.07424
•
DOI:
- 10.1038/nphys4111

[7]

Evidence for Flow from Hydrodynamic Simulations of $p$ -Pb Collisions at 5.02 TeV from $\nu_2$ Mass Splitting

K. Werner
(
- SUBATECH, Nantes
)
,
M. Bleicher
(
- Frankfurt U., FIAS
)
,
B. Guiot
(
- SUBATECH, Nantes
)
,
Iu. Karpenko
(
- BITP, Kiev and
- Frankfurt U., FIAS
)
,
T. Pierog
(
- KIT, Karlsruhe
)

- Phys.Rev.Lett. 112 (2014) 23, 232301
•
e-Print:
- 1307.4379
•
DOI:
- 10.1103/PhysRevLett.112.232301

[8]

Effects of Overlapping Strings in pp Collisions

- JHEP 03 (2015) 148
•
e-Print:
- 1412.6259
•
DOI:
- 10.1007/JHEP03(2015)148

[9]

Indication of change of phase in high-multiplicity proton-proton events at LHC in String Percolation Model

I. Bautista
(
- Puebla U., Mexico
)
,
A. Fernandez Téllez
(
- Puebla U., Mexico
)
,
Premomoy Ghosh
(
- Calcutta, VECC
)

- Phys.Rev.D 92 (2015) 7, 071504
•
e-Print:
- 1509.02278
•
DOI:
- 10.1103/PhysRevD.92.071504

[10]

An introduction to PYTHIA 8.2

et al.

- Comput.Phys.Commun. 191 (2015) 159-177
•
e-Print:
- 1410.3012
•
DOI:
- 10.1016/j.cpc.2015.01.024

[11]

Color Reconnection and Flowlike Patterns in $pp$ Collisions

Antonio Ortiz Velasquez
(
- Lund U.
)
,
Peter Christiansen
(
- Lund U.
)
,
Eleazar Cuautle Flores
(
- Mexico U., ICN
)
,
Ivonne Maldonado Cervantes
(
- Mexico U., ICN
)
,
Guy Paić
(
- Mexico U., ICN
)

- Phys.Rev.Lett. 111 (2013) 4, 042001
•
e-Print:
- 1303.6326
•
DOI:
- 10.1103/PhysRevLett.111.042001

[12]

Azimuthal anisotropy relative to the participant plane from a multiphase transport model in central p + Au , d + Au , and $^{3}$ He + Au collisions at $\sqrt{s_{NN}}=200$ GeV

- Phys.Rev.C 92 (2015) 5, 054903
•
e-Print:
- 1501.06880
•
DOI:
- 10.1103/PhysRevC.92.054903

[13]

Collectivity in Small Collision Systems: An Initial-State Perspective

Sören Schlichting
(
- Brookhaven and
- Washington U., Seattle
)
,
Prithwish Tribedy
(
- Brookhaven
)

- Adv.High Energy Phys. 2016 (2016) 8460349
•
e-Print:
- 1611.00329
•
DOI:
- 10.1155/2016/8460349

[14]

Mass ordering of spectra from fragmentation of saturated gluon states in high multiplicity proton-proton collisions

Bjoern Schenke
(
- Brookhaven Natl. Lab.
)
,
Soeren Schlichting
(
- Brookhaven Natl. Lab.
)
,
Prithwish Tribedy
(
- Brookhaven Natl. Lab.
)
,
Raju Venugopalan
(
- Brookhaven Natl. Lab. and
- U. Heidelberg, ITP
)

- Phys.Rev.Lett. 117 (2016) 16, 162301
•
e-Print:
- 1607.02496
•
DOI:
- 10.1103/PhysRevLett.117.162301

[15]

Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC

ALICE

Collaboration

•

Betty Abelev
(
- LLNL, Livermore
)

et al.

- JHEP 09 (2013) 049
•
e-Print:
- 1307.1249
•
DOI:
- 10.1007/JHEP09(2013)049

[16]

Revealing the source of the radial flow patterns in proton–proton collisions using hard probes

Antonio Ortiz
(
- Mexico U., ICN
)
,
Gyula Bencedi
(
- Mexico U., ICN and
- Wigner RCP, Budapest
)
,
Héctor Bello
(
- Mexico U., ICN and
- Puebla U., Mexico
)

- J.Phys.G 44 (2017) 6, 065001
•
e-Print:
- 1608.04784
•
DOI:
- 10.1088/1361-6471/aa6594

[17]

Centrality dependence of particle production in p-Pb collisions at $\sqrt{s_{\rm NN} }$ = 5.02 TeV

ALICE

Collaboration

•

Jaroslav Adam
(
- Prague, Tech. U.
)

et al.

- Phys.Rev.C 91 (2015) 6, 064905
•
e-Print:
- 1412.6828
•
DOI:
- 10.1103/PhysRevC.91.064905

[18]

Higher-Twist Dynamics in Large Transverse Momentum Hadron Production

- Phys.Rev.Lett. 105 (2010) 062002
•
e-Print:
- 0911.4604
•
DOI:
- 10.1103/PhysRevLett.105.062002

[19]

Mid-rapidity charged hadron transverse spherocity in pp collisions simulated with Pythia

- Nucl.Phys.A 941 (2015) 78-86
•
e-Print:
- 1503.03129
•
DOI:
- 10.1016/j.nuclphysa.2015.05.010

[20]

Experimental results on event shapes at hadron colliders

Antonio Ortiz
(
- Lund U. and
- Mexico U., ICN
)

- Adv.Ser.Direct.High Energy Phys. 29 (2018) 343-357,
- Advanced Series on Directions in High Energy Physics Vol. 29 - Multiple Parton Interactions at the LHC, 2018
•
e-Print:
- 1705.02056
•
DOI:
- 10.1142/9789813227767_0016

[21]

Multiplicity dependence of the average transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC

ALICE

Collaboration

•

Betty Bezverkhny Abelev
(
- LLNL, Livermore
)

et al.

- Phys.Lett.B 727 (2013) 371-380
•
e-Print:
- 1307.1094
•
DOI:
- 10.1016/j.physletb.2013.10.054

[22]

Performance of the ALICE Experiment at the CERN LHC

ALICE

Collaboration

•

Betty Bezverkhny Abelev
(
- LLNL, Livermore
)

et al.

- Int.J.Mod.Phys.A 29 (2014) 1430044
•
e-Print:
- 1402.4476
•
DOI:
- 10.1142/S0217751X14300440

[23]

PYTHIA 6.4 Physics and Manual

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- Fermilab
)

- JHEP 05 (2006) 026
•
e-Print:
- hep-ph/0603175
•
DOI:
- 10.1088/1126-6708/2006/05/026

[24]

Tuning Monte Carlo Generators: The Perugia Tunes

Peter Zeiler Skands
(
- CERN
)

- Phys.Rev.D 82 (2010) 074018
•
e-Print:
- 1005.3457
•
DOI:
- 10.1103/PhysRevD.82.074018

[25]

GEANT Detector Description and Simulation Tool

et al.

DOI:
- 10.17181/CERN.MUHF.DMJ1

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