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Extremely long-lived universal resonant Bose gases
Quantum simulations based on near-resonance Bose gases are limited by their
short lifetimes due to severe atom losses. In addition to this, the recently
predicted thermodynamical instability adds another constraint on accessing the
resonant Bose gases. In this Letter, we offer a potential solution by proposing
long-lived resonant Bose gases in both two and three dimensions, where the
conventional few-body losses are strongly suppressed. We show that the
thermodynamical properties as well as the lifetimes of these strongly
interacting systems are universal, and independent of short-range physics.Comment: 5 page
Computation of the coefficients for order anomalous chiral Lagrangian
We present the results of computing the order low energy constants in
the anomalous part of chiral Lagrangian both for two and three flavor
pseudoscalar mesons. This is a generalization of our previous work on
calculating the order coefficients for the normal part chiral Lagrangian
in terms of the quark self energy . We show that most of our
results are consistent with those we can find in the literature.Comment: 20 page
Computation of the order low-energy constants with tensor sources
We present the results of calculations of the and order
low-energy constants for the chiral Lagrangian with tensor sources for both two
and three flavors of pseudoscalar mesons. This is a generalization of our
previous work on similar calculations without tensor sources in terms of the
quark self-energy , based on the first principle derivation of the
low-energy effective Lagrangian and computation of the low-energy constants
with some rough approximations. With the help of partial integration and some
epsilon relations, we find that some order operators with tensor sources
appearing in the literature are related to each other. That leaves 98
independent terms for -flavor, 92 terms for three-flavor, and 65 terms for
two-flavor cases. We also find that the odd-intrinsic-parity chiral Lagrangian
with tensor sources cannot independently exist in any order of low-energy
expansion.Comment: 29 page
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