Letters in High Energy Physics http://journals.andromedapublisher.com/index.php/LHEP en-US <p align="justify">Letters in High Energy Physics (LHEP) is an open access journal published by Andromeda Publishing and Education Services. The articles in LHEP are distributed according to the terms of <a href="http://creativecommons.org/licenses/by/4.0" target="_blank" rel="noopener">the creative commons license CC-BY 4.0</a>. Under the terms of this license, copyright is retained by the author while use, distribution and reproduction in any medium are permitted provided proper credit is given to original authors and sources.</p> <h2 style="margin-bottom: 0px; margin-top: 0px;">Terms of Submission</h2> <p style="margin-top: 0px; margin-bottom: 0px;" align="justify">By submitting an article for publication in LHEP, the submitting author asserts that:.</p> <ol style="margin-top: 0px; margin-bottom: 0px;"> <li>The article presents original contributions by the author(s) which have not been published previously in a peer-reviewed medium and are not subject to copyright protection.</li> <li>The co-authors of the article, if any, as well as any institution whose approval is required, agree to the publication of the article in LHEP.</li> </ol> khalil@andromedapublisher.com (Professor Shaaban Khalil) lhep@andromedapublisher.com (LHEP Editorial Team) Wed, 13 Nov 2019 20:59:46 +0000 OJS http://blogs.law.harvard.edu/tech/rss 60 Polarizability of the nucleon http://journals.andromedapublisher.com/index.php/LHEP/article/view/136 <p>The status of the experimental and theoretical investigations of the nucleon is presented. This includes a confirmation of the validity of the previously&nbsp; introduced recommended&nbsp; polarizabilities. It is shown that the only meaningful approach to a prediction of the polarizabilities&nbsp; is obtained from nonsubtracted dispersion theory, where the appropriate degrees of freedon taken from other precise experimental data are taken into account. The present&nbsp; values of the recommended polarizabilities are \(\alpha_p=12.0\pm 0.5\), \(\beta_p=1.9\mp 0.5\), \(\alpha_n=12.6\pm 1.2\),&nbsp; \(\beta_n=2.6\mp 1.2\) in units of \(10^{-4}\)fm\(^3\) and \(\gamma^{(p)}_\pi =-36.4 \pm 1.5\),&nbsp; \(\gamma^{(n)}_\pi=+58.6\pm 4.0\), \(\gamma^{(p)}_0= -0.58\pm 0.20\), \(\gamma^{(n)}_0=+0.38\pm 0.22\) in units of \(10^{-4}\)fm\(^4\).</p> Martin Schumacher ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 http://journals.andromedapublisher.com/index.php/LHEP/article/view/136 Mon, 11 Nov 2019 22:26:21 +0000 First results of the KATRIN neutrino mass experiment and their consistency with an exotic 3 + 3 model http://journals.andromedapublisher.com/index.php/LHEP/article/view/139 <p>Although the first results of the KATRIN neutrino mass experiment are consistent with a new<br>improved upper limit of 1.1 eV for the effective mass of the electron neutrino, surprisingly they are<br>also consistent with an exotic model of the neutrino masses put forward in 2013 that includes one<br>tachyonic mass state doublet having m<sup>2</sup>&nbsp;∼ -0.2 keV<sup>2</sup>&nbsp;. A definnitive conclusion on the validity of the<br>model should be possible after less than one year of KATRIN data-taking.</p> Robert Ehrlich ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 http://journals.andromedapublisher.com/index.php/LHEP/article/view/139 Tue, 31 Dec 2019 00:00:00 +0000