Dispersive construction of two-loop P→πππ(P=K,η) amplitudes
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DOI: 10.1103/physrevd.101.074043
Abstract: We present and develop a general dispersive framework allowing to construct representations of the amplitudes for the processes $P\pi\to\pi\pi$, $P=K,\eta$, valid at the two-loop level in the low-energy expansion. The construction proceeds through a two-step… read more here.
Keywords: loop amplitudes; dispersive construction; two loop; construction two ... See more keywords