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Mapping chiral symmetry breaking in the excited baryon spectrum

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2016-09-07
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Amer Physical Soc
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We study the conjectured “insensitivity to chiral symmetry breaking” in the highly excited light baryon spectrum. While the experimental spectrum is being measured at JLab and CBELSA/TAPS, this insensitivity remains to be computed theoretically in detail. As the only existing option to have both confinement, highly excited states, and chiral symmetry, we adopt the truncated Coulomb-gauge formulation of QCD, considering a linearly confining Coulomb term. Adopting a systematic and numerically intensive variational treatment up to 12 harmonic oscillator shells we are able to access several angular and radial excitations. We compute both the excited spectra of I=1/2 and I=3/2 baryons, up to large spin J=13/2, and study in detail the proposed chiral multiplets. While the static-light and light-light spectra clearly show chiral symmetry restoration high in the spectrum, the realization of chiral symmetry is more complicated in the baryon spectrum than earlier expected.
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© 2016 American Physical Society. P. B. and M. C. acknowledge the use of the CPU and GPU servers of PtQCD, supported by CFTP, FCT, and NVIDIA and Grant No. FCT UID/FIS/00777/2013. M. C. is supported by FCT under Contract No. SFRH/BPD/73140/2010. The work of F. J. L. E. relied on the Spanish Excellence Network on Hadronic Physics Grant No. FIS2014-57026-REDT, and Grants No. UCM:910309 and No. MINECO:FPA2014-53375-C2-1-P. F. J. L. E. also thanks the Department of Energy’s Institute for Nuclear Theory at the University of Washington for its partial support and hospitality. T. V C. work was partially performed at Ghent University with support of the Fund for Scientific Research of Flanders.
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P. Bicudo, M. Cardoso, T. Van Cauteren, and F. J. Llanes-Estrada, Phys. Rev. Lett. 103, 092003 (2009). F. J. Llanes-Estrada, P. Bicudo, M. Cardoso, and T. Van Cauteren, in Proceedings of the Mini-Workshop Bled 2008: Few-Quark States and the Continuum, Bled, Slovenia, 2008, p. 61. F. J. Llanes-Estrada, P. Bicudo, M. Cardoso, and T. Van Cauteren, Acta Phys. Pol. A 2, 313 (2009). T. Van Cauteren, P. Bicudo, M. Cardoso, and F. J. Llanes-Estrada, EPJ Web Conf. 3, 03012 (2010). F. J. Llanes-Estrada, Proc. Sci. LC2010 (2010) 066. F. J. Llanes-Estrada and G. M. Navarro, Mod. Phys. Lett. A 27, 1250033 (2012). C. E. Detar and T. Kunihiro, Phys. Rev. D 39, 2805 (1989). T. D. Cohen, Rev. Mod. Phys. 68, 599 (1996). T. D. Cohen and X. D. Ji, Phys. Rev. D 55, 6870 (1997). L. Y. Glozman, Phys. Lett. B 475, 329 (2000). D. Jido, T. Hatsuda, and T. Kunihiro, Phys. Rev. Lett. 84, 3252 (2000). T. D. Cohen and L. Y. Glozman, Phys. Rev. D 65, 016006 (2001). E. S. Swanson, Phys. Lett. B 582, 167 (2004). T. D. Cohen and L. Y. Glozman, Mod. Phys. Lett. A 21, 1939 (2006). L. Y. Glozman, A. V. Nefediev, and J. E. F. T. Ribeiro, Phys. Rev. D 72, 094002 (2005). R. F. Wagenbrunn and L. Y. Glozman, Phys. Lett. B 643, 98 (2006). L. Y. Glozman, Phys. Rep. 444, 1 (2007). P. Bicudo, N. Brambilla, E. Ribeiro, and A. Vairo, Phys. Lett. B 442, 349 (1998). F. J. Llanes-Estrada and S. R. Cotanch, Phys. Rev. Lett. 84, 1102 (2000). R. F. Wagenbrunn and L. Y. Glozman, Phys. Rev. D 75, 036007 (2007). V. K. Sazonov, G. Schaffernak, and R. F. Wagenbrunn, Phys. Rev. D 90, 014004 (2014). P. Bicudo, arXiv:1512.09191. A. V. Nefediev, J. E. F. T. Ribeiro, and A. P. Szczepaniak, JETP Lett. 87, 271 (2008). A. Le Yaouanc, L. Oliver, S. Ono, O. Pene, and J. C. Raynal, Phys. Rev. D 31, 137 (1985). A. Amer, A. Le Yaouanc, L. Oliver, O. Pene, and J. c. Raynal, Phys. Rev. Lett. 50, 87 (1983). A. Le Yaouanc, L. Oliver, O. Pene, and J. C. Raynal, Phys. Rev. D 29, 1233 (1984). A. Le Yaouanc, L. Oliver, O. Pene, and J. C. Raynal, Phys. Lett. 134B, 249 (1984). A. Amer, A. Le Yaouanc, L. Oliver, O. Pene, and J. C. Raynal, Phys. Rev. D 28, 1530 (1983). P. J. d. A. Bicudo and J. E. F. T. Ribeiro, Phys. Rev. D 42, 1611 (1990). P. J. d. A. Bicudo and J. E. F. T. Ribeiro, Phys. Rev. D 42, 1625 (1990). P. J. d. A. Bicudo and J. E. F. T. Ribeiro, Phys. Rev. D 42, 1635 (1990). F. J. Llanes-Estrada and S. R. Cotanch, Nucl. Phys. A697, 303 (2002). J. M. Torres-Rincon and F. J. Llanes-Estrada, Phys. Rev. Lett. 105, 022003 (2010). F. J. Llanes-Estrada et al., in Proceedings of 3rd International Conference on Nuclear and Particle Physics with CEBAF at Jefferson Lab (NAPP 2010), Dubrovnik, Croatia [Fizika B20, 63 (2011)]. S. Coito, G. Rupp, and E. van Beveren, Phys. Rev. D 84, 094020 (2011). U. Thoma, in International Workshop XXXIV on Gross Properties of Nuclei and Nuclear Excitations, Hirschegg, 2007 (World Scientific, Singapore, 2006). A. Wilson et al. (CBELSA/TAPS Collaboration), Phys. Lett. B 749, 407 (2015). V. Sokhoyan et al. (CBELSA/TAPS Collaboration), Eur. Phys. J. A 51, 95 (2015); 51, 187 (2015). V. Crede and W. Roberts, Rep. Prog. Phys. 76, 076301 (2013). D. I. Glazier, Acta Phys. Pol. A 8, 503 (2015). V. Crede, AIP Conf. Proc. 1701, 020007 (2016). A. Anisovich, E. Klempt, A. Sarantsev, and U. Thoma, Eur. Phys. J. A 24, 111 (2005). A. V. Anisovich and A. V. Sarantsev, Eur. Phys. J. A 30, 427 (2006). A. V. Anisovich, R. Beck, E. Klempt, V. A. Nikonov, A. V. Sarantsev, and U. Thoma, Eur. Phys. J. A 48, 15 (2012). I. Denisenko et al., Phys. Lett. B 755, 97 (2016). U. Loring, K. Kretzschmar, B. C. Metsch, and H. R. Petry, Eur. Phys. J. A 10, 309 (2001). U. Loring, B. C. Metsch, and H. R. Petry, Eur. Phys. J. A 10, 395 (2001). U. Loring, B. C. Metsch, and H. R. Petry, Eur. Phys. J. A 10, 447 (2001). W. Plessas, Int. J. Mod. Phys. A A30, 1530013 (2015). J. P. Day, K. S. Choi, and W. Plessas, Few-Body Syst. 54, 329 (2013). L. Theussl, R. F. Wagenbrunn, B. Desplanques, and W. Plessas, Eur. Phys. J. A 12, 91 (2001). S. L. Adler and A. C. Davis, Nucl. Phys. B244, 469 (1984). P. Bicudo, J. E. Ribeiro, and J. Rodrigues, Phys. Rev. C 52, 2144 (1995). K. A. Olive et al. (Particle Data Group Collaboration), Chin. Phys. C 38, 090001 (2014). R. G. Edwards et al. (Hadron Spectrum Collaboration), Phys. Rev. D 87, 054506 (2013). J. P. Vary et al., arXiv:1507.04693. E. Dikmen, A. F. Lisetski, B. R. Barrett, P. Maris, A. M. Shirokov, and J. P. Vary, Phys. Rev. C 91, 064301 (2015). R. L. Jaffe, D. Pirjol, and A. Scardicchio, Phys. Rev. Lett. 96, 121601 (2006); Phys. Rev. D 74, 057901 (2006). N. H. Christ and T. D. Lee, Phys. Rev. D 22, 939 (1980); Phys. Scr. 23, 970 (1981). W. Lucha and F. F. Schoberl, Phys. Rev. Lett. 64, 2733 (1990). P. J. A. Bicudo, J. E. F. T. Ribeiro, and R. Fernandes, Phys. Rev. C 59, 1107 (1999). I. C. Cloet, C. D. Roberts, and A. W. Thomas, Phys. Rev. Lett. 111, 101803 (2013). P. J. A. Bicudo, G. Krein, J. E. F. T. Ribeiro, and J. E. Villate, Phys. Rev. D 45, 1673 (1992). P. J. A. Bicudo and A. V. Nefediev, Phys. Rev. D 68, 065021 (2003). P. Bicudo, Nucl. Phys. A870–871, 112 (2011). K. Langfeld and L. Moyaerts, Phys. Rev. D 70, 074507 (2004); T. Heinzl et al., 78, 034504 (2008). P. O. Bowman, U. M. Heller, D. B. Leinweber, M. B. Parappilly, A. G. Williams, and J. b. Zhang, Phys. Rev. D 71, 054507 (2005). F. J. Llanes-Estrada, Report No. UMI-99-92457. A. P. Szczepaniak and E. S. Swanson, Phys. Rev. D 65, 025012 (2001). N. Isgur and G. Karl, Phys. Rev. D 19, 2653 (1979); 23, 817 (1981). M. Moshinsky, Nucl. Phys. 13, 104 (1959). T. A. Brody, Tables of Transformation Brackets for Nuclear Shell-Model Calculations (Gordon and Breach, New York, 1967). M. Moshinsky, The Harmonic Oscillator in Modern Physics: From Atoms to Quarks (Gordon and Breach, New York, 1969). J. E. T. Ribeiro, Z. Phys. C 5, 27 (1980). E. van Beveren, Z. Phys. C 17, 135 (1983). V. I. Lebedev and D. N. Laikov, Doklady Mathematics 59, 477 (1999). R. N. Perez, J. E. Amaro, E. R. Arriola, P. Maris, and J. P. Vary, Phys. Rev. C 92, 064003 (2015). E. Eichten, K. Gottfried, T. Kinoshita, K. D. Lane, and T.-M. Yan, Phys. Rev. D 17, 3090 (1978). D. A. Varshalovich, A. N. Moshalev, and V. K. Khersonskii, Quantum Theory of Angular Momentum (World Scientific, Singapore, 1988), specifically Sec. 12.1.5, Eq. (14), p. 456.
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