PHENIX results on jet modification with $\pi^0$-and photon-triggered two particle correlations in $p+p, p(d)$+Au, and Au+Au collisions

As a colorless probe, direct photons balance the p T of the away-side jet at leading order. Direct photon-hadron correlations are thus an excellent probe for nuclear structure and QCD effects, including parton energy loss in the Quark-Gluon Plasma. PHENIX has measured π0 and direct photon-triggered two-particle azimuthal correlations in a variety of collision systems ranging from p + p to Au+Au at 200 GeV. In p +Au and d +Au collisions, no modification of the per-trigger jet yield or away-side correlation width compared to p + p collisions is observed for direct photon triggered correlations while an increase in the away-side width for π0 triggered correlations in p +Au has been measured. In Au+Au collisions, direct photons have been identified statistically as well as using an isolation cut. Combining data sets from different collision systems allows us to quantify the transition from suppression at high zT(pT,h/pT,γ) to the enhancement of low zT particles relative to p + p , and to study this transition as a function of trigger pT .

Note:

Proceedings for the 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018)

Two-particle angular correlations
direct photons
talk: Venice 2018/05/14
p p: scattering
p nucleus: interaction
heavy ion: scattering
gold
photon: direct production
photon hadron: correlation
correlation: two-particle

References(6)

Figures(6)

[1]

The Spin Structure of the Nucleon

- Rev.Mod.Phys. 85 (2013) 655-691
•
e-Print:
- 1209.2803
•
DOI:
- 10.1103/RevModPhys.85.655

[2]

No Generalized TMD-Factorization in Hadro-Production of High Transverse Momentum Hadrons

- Phys.Rev.D 81 (2010) 094006
•
e-Print:
- 1001.2977
•
DOI:
- 10.1103/PhysRevD.81.094006

[3]

Nonperturbative transverse-momentum-dependent effects in dihadron and direct photon-hadron angular correlations in $p+p$ collisions at $\sqrt{s}=200$ GeV

PHENIX

Collaboration

•

C. Aidala
(
- Michigan U.
)

et al.

- Phys.Rev.D 98 (2018) 7, 072004
•
e-Print:
- 1805.02450
•
DOI:
- 10.1103/PhysRevD.98.072004

[4]

Tevatron Run-1 $Z$ boson data and Collins-Soper-Sterman resummation formalism

F. Landry
(
- Michigan State U.
)
,
R. Brock
(
- Michigan State U.
)
,
Pavel M. Nadolsky
(
- Southern Methodist U.
)
,
C.P. Yuan
(
- Michigan State U.
)

- Phys.Rev.D 67 (2003) 073016
•
e-Print:
- hep-ph/0212159
•
DOI:
- 10.1103/PhysRevD.67.073016

[5]

Medium modification of jet fragmentation in Au + Au collisions at $\sqrt{s_{NN}}= 200$ GeV measured in direct photon-hadron correlations

PHENIX

Collaboration

•

A. Adare
(
- Colorado U.
)

et al.

- Phys.Rev.Lett. 111 (2013) 3, 032301
•
e-Print:
- 1212.3323
•
DOI:
- 10.1103/PhysRevLett.111.032301

[6]

Photon-Hadron Jet Correlations in p+p and Au+Au Collisions at s**(1/2) = 200-GeV

PHENIX

Collaboration

•

A. Adare
(
- Colorado U.
)

et al.

- Phys.Rev.C 80 (2009) 024908
•
e-Print:
- 0903.3399
•
DOI:
- 10.1103/PhysRevC.80.024908

PHENIX results on jet modification with π0\pi^0π0-and photon-triggered two particle correlations in p+p,p(d)p+p, p(d)p+p,p(d)+Au, and Au+Au collisions

Citations per year

The Spin Structure of the Nucleon

No Generalized TMD-Factorization in Hadro-Production of High Transverse Momentum Hadrons

Nonperturbative transverse-momentum-dependent effects in dihadron and direct photon-hadron angular correlations in p+pp+pp+p collisions at s=200\sqrt{s}=200s​=200 GeV

Tevatron Run-1 ZZZ boson data and Collins-Soper-Sterman resummation formalism

Medium modification of jet fragmentation in Au + Au collisions at sNN=200\sqrt{s_{NN}}= 200sNN​​=200 GeV measured in direct photon-hadron correlations

Photon-Hadron Jet Correlations in p+p and Au+Au Collisions at s**(1/2) = 200-GeV