RECORD
Consequences of high-$x$ proton size fluctuations in small collision systems at RHIC
Nuclear Theory · Submitted 21 Mar 2016
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We conclude that analogous measurements in recently collected $p$$+$Au and $^3$He$+$Au collision data at RHIC can provide a unique test of these predictions.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
Recent measurements of jet production rates at large transverse momentum ($p_T$) in the collisions of small projectiles with large nuclei at RHIC and the LHC indicate that they have an unexpected relationship with estimates of the collision centrality. One compelling interpretation of the data is that it captures an $x_p$-dependent decrease in the average interaction strength of the nucleon in the projectile undergoing a hard scattering. A weakly interacting or "shrinking" nucleon in the projectile strikes fewer nucleons in the nucleus, resulting in a particular pattern of centrality-dependent modifications to high-$p_T$ processes. We describe a simple one-parameter geometric implementation of this picture within a modified Monte Carlo Glauber model tuned to $d$$+$Au jet data, and explore two of its major consequences. First, the model predicts a particular projectile-species dependence to the centrality dependence at high-$x_p$, opposite to that expected from an energy loss effect. Second, we find that some of the large centrality dependence observed for forward di-hadron production in $d$$+$Au collisions at RHIC may arise from the physics of the "shrinking" projectile nucleon, in addition to impact parameter-dependent shadowing or saturation effects at low nuclear-$x$. We conclude that analogous measurements in recently collected $p$$+$Au and $^3$He$+$Au collision data at RHIC can provide a unique test of these predictions.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Recent measurements of jet production rates at large transverse momentum ($p_T$) in the collisions of small projectiles with large nuclei at RHIC and the LHC indicate that they have an unexpected relationship with estimates of the collision centrality. | background 1.00 | 0.07 | 0.03 | hedged possibility 0.80 |
| s1 | One compelling interpretation of the data is that it captures an $x_p$-dependent decrease in the average interaction strength of the nucleon in the projectile undergoing a hard scattering. | interpretation 0.97 | 0.09 | 0.18 | hedged possibility 0.92 |
| s2 | A weakly interacting or "shrinking" nucleon in the projectile strikes fewer nucleons in the nucleus, resulting in a particular pattern of centrality-dependent modifications to high-$p_T$ processes. | interpretation 0.97 | 0.11 | 0.09 | asserted 0.98 |
| s3 | We describe a simple one-parameter geometric implementation of this picture within a modified Monte Carlo Glauber model tuned to $d$$+$Au jet data, and explore two of its major consequences. | method 0.76 | 0.94 | 0.06 | asserted 0.97 |
| s4 | First, the model predicts a particular projectile-species dependence to the centrality dependence at high-$x_p$, opposite to that expected from an energy loss effect. | result 1.00 | 0.88 | 0.17 | asserted 0.97 |
| s5 | Second, we find that some of the large centrality dependence observed for forward di-hadron production in $d$$+$Au collisions at RHIC may arise from the physics of the "shrinking" projectile nucleon, in addition to impact parameter-dependent shadowing or saturation effects at low nuclear-$x$. | result 0.77 | 0.92 | 0.18 | hedged possibility 0.98 |
| s6 | We conclude that analogous measurements in recently collected $p$$+$Au and $^3$He$+$Au collision data at RHIC can provide a unique test of these predictions. | future work 1.00 | 0.30 | 0.71 | hedged possibility 0.62 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
Recent measurements of jet production rates at large transverse momentum ($p_T$) in the collisions of small projectiles with large nuclei at RHIC and the LHC indicate that they have an unexpected relationship with estimates of the collision centrality. One compelling interpretation of the data is that it captures an $x_p$-dependent decrease in the average interaction strength of the nucleon in the projectile undergoing a hard scattering. A weakly interacting or "shrinking" nucleon in the projectile strikes fewer nucleons in the nucleus, resulting in a particular pattern of centrality-dependent modifications to high-$p_T$ processes. We describe a simple one-parameter geometric implementation of this picture within a modified Monte Carlo Glauber model tuned to $d$$+$Au jet data, and explore two of its major consequences. First, the model predicts a particular projectile-species dependence to the centrality dependence at high-$x_p$, opposite to that expected from an energy loss effect. Second, we find that some of the large centrality dependence observed for forward di-hadron production in $d$$+$Au collisions at RHIC may arise from the physics of the "shrinking" projectile nucleon, in addition to impact parameter-dependent shadowing or saturation effects at low nuclear-$x$. We conclude that analogous measurements in recently collected $p$$+$Au and $^3$He$+$Au collision data at RHIC can provide a unique test of these predictions.
Human review
References
How the literature uses it
5 arXiv papers cite this in 7 sentences
Papers citing it · 5 sentences without a confident label
Compares with it 1 paper
-
In the case of the RHIC data, our analysis yields slightly smaller values of $λ(x_p)$ than those in Ref. [ref] , due to differences in the treatment of the collision geometry.
Global analysis of color fluctuation effects in proton- and deuteron-nucleus collisions at RHIC and the LHC · Introduction · 1.00
Cites it as background 1 paper
-
Recent work has focused on including wounded quarks instead of nucleons in Glauber type models [ref] , proton size fluctuations [ref] , and shape fluctuations driven by fluctuations of the proton spin [ref] .
Origins of collectivity in small systems · Subnucleonic fluctuations and their effect on anisotropic flow in p+Pb collisions · 0.91
What it cites · 30 sentences without a confident label
Uses the method or tool of 6 papers
-
Thus, following Ref. [ref] , we estimate the mean by assuming that the hadrons are the leading fragments of the outgoing hard-scattered partons in a leading order $2→2$ picture, [equation] where $(p_T,1, p_T,2)$ and $(η_1, η_2)$ refer to the leading and subleading hadron and pseudorapidity, and the typical fraction of the parton's contained by the leading fragment is taken to be $<z> = 0.6$.
Suppression of back-to-back hadron pairs at forward rapidity in d+Au Collisions at sqrt(s_NN)=200 GeV · Di-hadron correlations · 0.82
-
To determine the effects of the shrinking proton on experimentally measured centrality-dependent hard-scattered yields, the consequences of Eq. [ref] are implemented in the MC-Glauber analysis and centrality framework used by the PHENIX experiment in Ref. [ref] .
1310.4793 · Application to experimental centrality models · 0.99
-
The PHOBOS Glauber Monte Carlo code [ref] is used to simulate the possible range of $p$/$d$/$^3$He+Au collision geometries.
Improved version of the PHOBOS Glauber Monte Carlo · Application to experimental centrality models · 1.00
Uses data or values from 2 papers
-
In our analysis, $β$ was ultimately determined to be $1.38^+0.09_-0.07$ by implementing this shrinking nucleon picture in a Glauber Monte Carlo analysis, convolving with the centrality framework used by PHENIX, and fitting to the centrality-dependent jet data in Ref. [ref] .
1509.04657 · Geometric picture of shrinking proton · 0.91
-
For our purposes, we focus on the PHENIX measurement of di-hadron production [ref] , since the centrality framework and selection is identical to that described in Sec. [ref].
Suppression of back-to-back hadron pairs at forward rapidity in d+Au Collisions at sqrt(s_NN)=200 GeV · Di-hadron correlations · 0.85
Compares with 2 papers
-
The calculations are compared to the centrality-dependent jet and measurement by PHENIX [ref] , under the assumption that the production of jets at $y=0$ corresponds to typical values given by [equation]
1509.04657 · Results and discussion · 0.97
-
This is in striking contrast to the forward rapidity (up to $y ∼+4$) jet data in collisions at the LHC which have a centrality dependent modification that is consistent with being only a function of [ref] .
Centrality and rapidity dependence of inclusive jet production in $\sqrt{s_\mathrm{NN}} = 5.02$ TeV proton-lead collisions with the ATLAS detector · Di-hadron correlations · 0.98
Cites as background 3 papers
-
This suppression has popularly been interpreted as arising from large, impact parameter dependent shadowing or parton saturation effects in the nuclear medium [ref] , or from impact parameter dependent energy loss [ref] .
Renormalization group evolution of multi-gluon correlators in high energy QCD · Di-hadron correlations · 0.94
-
This suppression has popularly been interpreted as arising from large, impact parameter dependent shadowing or parton saturation effects in the nuclear medium [ref] , or from impact parameter dependent energy loss [ref] .
Back-to-Back Correlations of Di-hadrons in dAu Collisions at RHIC · Di-hadron correlations · 0.94
-
This suppression has popularly been interpreted as arising from large, impact parameter dependent shadowing or parton saturation effects in the nuclear medium [ref] , or from impact parameter dependent energy loss [ref] .
Dihadron momentum imbalance and correlations in d+Au collisions · Di-hadron correlations · 0.94
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.