Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter
We study the effect of strong magnetic field on competing chiral and diquark order parameters in a regime of moderately dense quark matter. The interdependence of the chiral and diquark condensates through nonperturbative quark mass and strong coupling effects is analyzed in a two-flavor Nambu-Jona-...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2017/6472909 |
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| author | Tanumoy Mandal Prashanth Jaikumar |
| author_facet | Tanumoy Mandal Prashanth Jaikumar |
| author_sort | Tanumoy Mandal |
| collection | DOAJ |
| description | We study the effect of strong magnetic field on competing chiral and diquark order parameters in a regime of moderately dense quark matter. The interdependence of the chiral and diquark condensates through nonperturbative quark mass and strong coupling effects is analyzed in a two-flavor Nambu-Jona-Lasinio (NJL) model. In the weak magnetic field limit, our results agree qualitatively with earlier zero-field studies in the literature that find a critical coupling ratio GD/GS~1.1 below which chiral or superconducting order parameters appear almost exclusively. Above the critical ratio, there exists a significant mixed broken phase region where both gaps are nonzero. However, a strong magnetic field B≳1018 G disrupts this mixed broken phase region and changes a smooth crossover found in the weak-field case to a first-order transition for both gaps at almost the same critical density. Our results suggest that in the two-flavor approximation to moderately dense quark matter strong magnetic field enhances the possibility of a mixed phase at high density, with implications for the structure, energetics, and vibrational spectrum of neutron stars. |
| format | Article |
| id | doaj-art-dc5fe40e51d74f9f9a02b8e0a1f8bf18 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-dc5fe40e51d74f9f9a02b8e0a1f8bf182025-02-03T05:47:47ZengWileyAdvances in High Energy Physics1687-73571687-73652017-01-01201710.1155/2017/64729096472909Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark MatterTanumoy Mandal0Prashanth Jaikumar1Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, SwedenDepartment of Physics and Astronomy, California State University Long Beach, Long Beach, CA 90840, USAWe study the effect of strong magnetic field on competing chiral and diquark order parameters in a regime of moderately dense quark matter. The interdependence of the chiral and diquark condensates through nonperturbative quark mass and strong coupling effects is analyzed in a two-flavor Nambu-Jona-Lasinio (NJL) model. In the weak magnetic field limit, our results agree qualitatively with earlier zero-field studies in the literature that find a critical coupling ratio GD/GS~1.1 below which chiral or superconducting order parameters appear almost exclusively. Above the critical ratio, there exists a significant mixed broken phase region where both gaps are nonzero. However, a strong magnetic field B≳1018 G disrupts this mixed broken phase region and changes a smooth crossover found in the weak-field case to a first-order transition for both gaps at almost the same critical density. Our results suggest that in the two-flavor approximation to moderately dense quark matter strong magnetic field enhances the possibility of a mixed phase at high density, with implications for the structure, energetics, and vibrational spectrum of neutron stars.http://dx.doi.org/10.1155/2017/6472909 |
| spellingShingle | Tanumoy Mandal Prashanth Jaikumar Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter Advances in High Energy Physics |
| title | Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter |
| title_full | Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter |
| title_fullStr | Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter |
| title_full_unstemmed | Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter |
| title_short | Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter |
| title_sort | effect of strong magnetic field on competing order parameters in two flavor dense quark matter |
| url | http://dx.doi.org/10.1155/2017/6472909 |
| work_keys_str_mv | AT tanumoymandal effectofstrongmagneticfieldoncompetingorderparametersintwoflavordensequarkmatter AT prashanthjaikumar effectofstrongmagneticfieldoncompetingorderparametersintwoflavordensequarkmatter |