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Nuclear Theory·nucl-th

Monday·September 5, 2016

9 papers—7 primary·2 cross-listed

All9Primary7Cross-lists2
  1. 08

    Search for Tetraneutron by Pion Double Charge Exchange Reaction at J-PARC

    Hiroyuki Fujioka🇯🇵 · Tomokazu Fukuda🇯🇵 · Toru Harada🇯🇵 · Emiko Hiyama🇯🇵 · Kenta Itahashi🇯🇵 · Shunsuke Kanatsuki🇯🇵 · Tomofumi Nagae🇯🇵 · Takuya Nanamura🇯🇵 · Takahiro Nishi🇯🇵

    Tetraneutron () has come back in the limelight, because of recent observation of a candidate resonant state at RIBF. We propose to investigate the pion double charge exchange (DCX) reaction, i.e. , as an alternative way to populate tetraneutron. An intense beam with the kinetic energy of ~850 MeV, much higher than that in past experiments at LAMPF and TRIUMF, will open up a possibility to improve the experimental sensitivity of the formation cross section, which will be much smaller than hitherto known DCX cross sections such as .

    ↳ nucl-exnucl-thJPS Conf.Proc.(2017)·2 citations
  2. 09

    Analytical On-shell Calculation of Low Energy Higher Order Scattering

    Barry R. Holstein🇺🇸

    We demonstrate that the use of analytical on-shell methods involving calculation of the discontinuity across the t-channel cut associated with the exchange of a pair of massless particles (photons or gravitons) can be used to evaluate one-loop contributions to electromagnetic and gravitational scattering, with and without polarizability, reproducing via simple algebraic manipulations, results obtained previously, generally using Feynman diagram techniques. In the gravitational case the use of factorization permits a straightforward and algebraic calculation of higher order scattering without consideration of ghost contributions or of triple-graviton couplings, which made previous evaluations considerably more arduous.

    ↳ hep-phgr-qchep-thnucl-thJ.Phys.G(2017)·21 citations

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first authorsco-authorsvia INSPIRE