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2018-04-19
14:12
OpenAccess [PUBDB-2018-01793] Book/Dissertation / PhD Thesis
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Beyond the SM searches at the LHC: Little Higgs models and Effective Field Theory
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 117 pp. (2018) [10.3204/PUBDB-2018-01793] = Dissertation, Universität Hamburg, 2018  GO
In this thesis, we discuss two different approaches to physics beyond the Standard Model.First, we study a model-independent Effective Field Theory formalism. In particular, wefocus on bosonic CP-even six-dimensional operators. [...]
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2018-04-18
09:35
[PUBDB-2018-01780] Talk (non-conference) (Invited)
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De Sitter from anti-D3-branes?
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2018-04-17
16:48
[PUBDB-2018-01776] Report/Contribution to a conference proceedings/Contribution to a book

String Core Effect on the Axion Dark Matter Abundance
[DESY-PROC-2017-02]
Saikawa, Ken'ichi "String Core Effect on the Axion Dark Matter Abundance" in Proceedings of the 13th "Patras" Workshop on Axions, WIMPs and WISPs, PATRAS 2017 / Maroudas, Marios (eds.), Verlag Deutsches Elektronen-Synchrotron : 2018 ; Patras 2017 : 13th Patras Workshop on Axions, WIMPs and WISPs, 2017-05-15 - 2017-05-19, Thessaloniki
13th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2017, Meeting locationThessaloniki, Greece, 15 May 2017 - 19 May 20172017-05-152017-05-19
Contributions / Info
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC, 223-226 (2018) [10.3204/DESY-PROC-2017-02/saikawa_kenichi]  GO
\vspace{-6mm} In this contribution, we highlight a problem in estimation of the mass of axion dark matter in the scenario where the Peccei-Quinn symmetry is broken after inflation. In order to obtain a definite prediction for its mass, it is necessary to evaluate its relic abundance precisely by taking account of the production from cosmic strings and domain walls. [...]
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2018-04-17
12:22
OpenAccess [PUBDB-2018-01730] Talk (non-conference) (Invited)
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Pole N-flation
Seminar, Meeting locationStanford, Stanford University, USA, 22 Mar 20182018-03-22  GO
This talk will describe progress towards an N-flationary version of ‘pole' or 'alpha-attractor inflation'. We will discuss the generic features of this class of models, including their predictions for CMB observables. [...]
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2018-04-16
11:35
OpenAccess [PUBDB-2018-01726] Talk (non-conference) (Invited)

The not-so-well tempered neutralino : Complementarity between dark matter searches and the LHC
ATLAS SUSY Working Group General Meeting, Meeting locationCERN, Geneva, DESY, Switzerland, 22 Mar 2018 - 22 Mar 20182018-03-222018-03-22  GO
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2018-04-12
23:53
OpenAccess [PUBDB-2018-01719] Conference Presentation

Global constraints on the top-quark EFT at lepton colliders
IAS program on high energy physics, Meeting locationHong Kong, HKUST, China, 8 Jan 2018 - 26 Jan 20182018-01-082018-01-26  GO
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2018-04-11
14:58
OpenAccess [PUBDB-2018-01689] Journal Article
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Sterile neutrino dark matter with supersymmetry
Sterile neutrino dark matter, a popular alternative to the WIMP paradigm, has generally been studied in non-supersymmetric setups. If the underlying theory is supersymmetric, we find that several interesting and novel dark matter features can arise [...]
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2018-04-11
14:55
OpenAccess [PUBDB-2018-01688] Report/Journal Article
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Runaway relaxion monodromy
[arXiv:1610.05320; DESY-16-159; MITP-16-108]
We examine the relaxion mechanism in string theory. An essential feature is that an axion winds over $N \gg 1$ fundamental periods. [...]
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2018-04-11
14:51
arXiv [PUBDB-2018-01687] Report/Contribution to a conference proceedings/Contribution to a book

Multiquark Hadrons — A New Facet of QCD
[DESY-16-090; arXiv:1605.05954]
Mathematical Physics : [Proceedings] - WORLD SCIENTIFIC, 2018. - ISBN 978-981-3224-96-4 (hardcover) 978-981-3224-98-8 (ebook)
14th Regional Conference on Mathematical Physics, Meeting locationQuaid-i-Azam University, Islamabad, 9 Nov 2015 - 14 Nov 20152015-11-092015-11-14
World Scientific, 26 pp. (2018) [10.1142/9789813224971_0016]  GO
review some selected aspects of the phenomenology of multiquark states discovered in high energy experiments. They have four valence quarks (called tetraquarks) and two of them are found to have five valence quarks (called pentaquarks), extending the conventional hadron spectrum which consists of quark-antiquark $(q\bar{q})$ mesons and qqq baryon. [...]

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2018-04-11
14:41
arXiv [PUBDB-2018-01686] Report/Journal Article

Gravitational radiation from a bulk flow model
[DESY-17-227; arXiv:1712.06869]
We perform simulations in a simple model that aims to mimic the hydrodynamic evolution of a relativistic fluid during a cosmological first-order phase transitions. The observable we are concerned with is hereby the spectrum of gravitational radiation produced by colliding fluid shells. [...]
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