Critical end points in (2+1)-flavor QCD with imaginary chemical potential

Goswami J, Karsch F, Lahiri A, Neumann M, Schmidt C (2019)
In: Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" . Proceedings of Science, 347. Trieste, Italy: Sissa Medialab.

Konferenzbeitrag | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
We present here the results from an ongoing determination of the critical quark mass in simulations of (2+1)-flavor QCD with an imaginary chemical potential. Studies with unimproved actions found the existence of a critical quark mass value at which the crossover transition ends on a second order phase transition and becomes first order for smaller values of the quark mass for the case of both vanishing and imaginary chemical potential. We use the Highly Improved Staggered Quark (HISQ) action and perform calculations in the Roberge-Weiss (RW) plane, where the value of the critical mass is expected to be largest. The lowest quark mass value used in our simulation corresponds to the pion mass $m_\pi$, down to $40$ MeV. Contrary to calculations performed with unimproved actions we find no evidence for the occurrence of first order transitions at the smallest quark mass values explored so far. Moreover we also show that the chiral observables are sensitive to the RW transition. Our results also indicate that the RW transition and chiral transition could coincide in the chiral limit.
Erscheinungsjahr
2019
Titel des Konferenzbandes
Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity"
forms.conference.field.series_title_volume.series_title.label
Proceedings of Science
Band
347
Art.-Nr.
162
Konferenz
12th International Workshop on Critical Point and Onset of Deconfinement (CPOD 2018)
Konferenzort
Corfu, Greece
Konferenzdatum
2018-09-24 – 2018-09-28
eISSN
1824-8039
Page URI
https://pub.uni-bielefeld.de/record/2936515

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Goswami J, Karsch F, Lahiri A, Neumann M, Schmidt C. Critical end points in (2+1)-flavor QCD with imaginary chemical potential. In: Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" . Proceedings of Science. Vol 347. Trieste, Italy: Sissa Medialab; 2019.
Goswami, J., Karsch, F., Lahiri, A., Neumann, M., & Schmidt, C. (2019). Critical end points in (2+1)-flavor QCD with imaginary chemical potential. Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" , Proceedings of Science, 347 Trieste, Italy: Sissa Medialab. doi:10.22323/1.347.0162
Goswami, J., Karsch, F., Lahiri, A., Neumann, M., and Schmidt, C. (2019). “Critical end points in (2+1)-flavor QCD with imaginary chemical potential” in Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" Proceedings of Science, vol. 347, (Trieste, Italy: Sissa Medialab).
Goswami, J., et al., 2019. Critical end points in (2+1)-flavor QCD with imaginary chemical potential. In Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" . Proceedings of Science. no.347 Trieste, Italy: Sissa Medialab.
J. Goswami, et al., “Critical end points in (2+1)-flavor QCD with imaginary chemical potential”, Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" , Proceedings of Science, vol. 347, Trieste, Italy: Sissa Medialab, 2019.
Goswami, J., Karsch, F., Lahiri, A., Neumann, M., Schmidt, C.: Critical end points in (2+1)-flavor QCD with imaginary chemical potential. Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" . Proceedings of Science. 347, Sissa Medialab, Trieste, Italy (2019).
Goswami, Jishnu, Karsch, Frithjof, Lahiri, Anirban, Neumann, Marius, and Schmidt, Christian. “Critical end points in (2+1)-flavor QCD with imaginary chemical potential”. Proceedings of Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" . Trieste, Italy: Sissa Medialab, 2019.Vol. 347. Proceedings of Science.

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arXiv: 1905.03625

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