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The QCD Equation of State in Small Systems
by W. A. Horowitz, Alexander Rothkopf
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | William Horowitz |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2109.01422v2 (pdf) |
| Date accepted: | 2022-03-15 |
| Date submitted: | 2022-03-02 06:14 |
| Submitted by: | Horowitz, William |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 50th International Symposium on Multiparticle Dynamics (ISMD2021) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Phenomenological |
Abstract
We present first results on finite system size corrections to the equation of state, trace anomaly, and speed of sound for two model systems: 1) free, massless scalar theory and 2) quenched QCD with periodic boundary conditions (PBC). We further present work-in-progress results for quenched QCD with Dirichlet boundary conditions.
Author comments upon resubmission
List of changes
The referee commented that:
1) "The abstract seems to start mid-paragraph! Some initial context appears to have been accidentally trimmed."
--Response: Yes! You're absolutely right. Thank you very much for catching this. Changed.
2) "In section 2, should the "phenomenologically relevant T ∼ 400 MeV" be phenomenologically *irrelevant*, since the volume is large and the finite-size effects small? This seems to be the case for the "plates" picture, but not the others, which fit the ~10% effect in the text. This part could do with some expansion to explain the relevance of the plates/tube/box labels, and the logic being used to argue T and TxL values in A+A and p+p systems: to a non-specialist like myself, this bit is interesting but opaque."
--Response: This is a nice comment, thank you. We added some sentences in the first paragraph of Section 2 expanding on the relevance for the small system size phenomenology for RHIC and LHC collisions for the more general reader
3) "It would be good to give more physics context to the trace-anomaly discussion and conclusion: what effect can this reduced coupling / increased speed of sound be expected to have on e.g. flow observables?"
--Response: This is another nice comment, thank you. We added a new second paragraph to Section 2 defining the trace anomaly in more detail and giving more insight into the phenomenological relevance of the speed of sound on flow and the extracted viscosity of the QGP fluid
Published as SciPost Phys. Proc. 10, 025 (2022)