Abstract
The quark mass dependence of the Roper mass is analyzed to one-loop order in covariant baryon chiral perturbation theory. The loop integrals are evaluated using infrared regularization which preserves chiral symmetry and establishes a chiral counting scheme. The derived chiral expansion of the Roper mass may prove useful for chiral extrapolations of lattice data. For couplings of natural size it is shown that the quark mass dependence of the Roper mass is similar to the one of the nucleon.
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Borasoy, B. (2008). Chiral corrections to the Roper mass. In: Hammer, HW., Kleber, V., Thoma, U., Schmieden, H. (eds) NSTAR 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85144-8_24
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DOI: https://doi.org/10.1007/978-3-540-85144-8_24
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-85143-1
Online ISBN: 978-3-540-85144-8
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