Accessing the gluon Wigner distribution in ultraperipheral pA collisions

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Accessing the gluon Wigner distribution in ultraperipheral pA collisions. / Hagiwara, Yoshikazu; Hatta, Yoshitaka; Pasechnik, Roman; Tasevsky, Marek; Teryaev, Oleg.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 96, No. 3, 034009, 01.08.2017.

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Hagiwara, Yoshikazu ; Hatta, Yoshitaka ; Pasechnik, Roman ; Tasevsky, Marek ; Teryaev, Oleg. / Accessing the gluon Wigner distribution in ultraperipheral pA collisions. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2017 ; Vol. 96, No. 3.

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TY - JOUR

T1 - Accessing the gluon Wigner distribution in ultraperipheral pA collisions

AU - Hagiwara, Yoshikazu

AU - Hatta, Yoshitaka

AU - Pasechnik, Roman

AU - Tasevsky, Marek

AU - Teryaev, Oleg

PY - 2017/8/1

Y1 - 2017/8/1

N2 - We propose to constrain the gluon Wigner distribution in the nucleon by studying the exclusive diffractive dijet production process in ultraperipheral proton-nucleus collisions (UPCs) at the RHIC and the LHC. Compared to the previous proposal in Ref. [Y. Hatta, B. W. Xiao, and F. Yuan, Phys. Rev. Lett. 116, 202301 (2016).PRLTAO0031-900710.1103/PhysRevLett.116.202301] to study the same observable in lepton-nucleon scattering, the use of UPCs has a few advantages: not only is the cross section larger, but the extraction of the Wigner distribution from the data also becomes simpler, including its elliptic angular dependence. We compute the corresponding cross section and evaluate the coefficients using models which include the gluon saturation effects. A potential for the measurements of the Wigner distribution at current and future experimental facilities is also discussed.

AB - We propose to constrain the gluon Wigner distribution in the nucleon by studying the exclusive diffractive dijet production process in ultraperipheral proton-nucleus collisions (UPCs) at the RHIC and the LHC. Compared to the previous proposal in Ref. [Y. Hatta, B. W. Xiao, and F. Yuan, Phys. Rev. Lett. 116, 202301 (2016).PRLTAO0031-900710.1103/PhysRevLett.116.202301] to study the same observable in lepton-nucleon scattering, the use of UPCs has a few advantages: not only is the cross section larger, but the extraction of the Wigner distribution from the data also becomes simpler, including its elliptic angular dependence. We compute the corresponding cross section and evaluate the coefficients using models which include the gluon saturation effects. A potential for the measurements of the Wigner distribution at current and future experimental facilities is also discussed.

U2 - 10.1103/PhysRevD.96.034009

DO - 10.1103/PhysRevD.96.034009

M3 - Article

VL - 96

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

T2 - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-2368

IS - 3

M1 - 034009

ER -