20200704 04:03 
Stellar Signatures of Inhomogeneous Big Bang Nucleosynthesis
/ Arbey, Alexandre (IP2I, Lyon ; CERN ; IUF, Paris) ; Auffinger, Jérémy (IP2I, Lyon) ; Silk, Joseph (Paris, Inst. Astrophys. ; Johns Hopkins U. ; Oxford U.)
We evaluate abundance anomalies generated in patches of the universe where the baryontophoton ratio was locally enhanced by possibly many orders of magnitude in the range $\eta = 10^{10}  10^{1}$. Our study is motivated by the possible survival of rare dense regions in the early universe, the most extreme of which, above a critical threshold, collapsed to form primordial black holes. [...]
arXiv:2006.02446; CERNTH2020067.
20200701  9 p.
 Published in : Phys. Rev. D 102 (2020) 023503
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20200429 05:49 
The FullyDifferential Gluon Beam Function at NNLO
/ Gaunt, Jonathan R. (CERN) ; Stahlhofen, Maximilian (Freiburg U.)
The fullydifferential beam function (dBF) is a universal ingredient in resummed predictions of hadron collider observables that probe the full kinematics of the incoming parton from each colliding proton  the virtuality and transverse momentum as well as the lightcone momentum fraction $x$. In this paper we compute the matching coefficients between the unpolarized gluon dBF and the usual parton distribution functions (PDFs) at the twoloop order. [...]
arXiv:2004.11915; CERNTH2020065; FRPHENO2020003.
20200730  21 p.
 Published in : JHEP 2007 (2020) 234
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20200429 05:48 
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20200425 04:01 
Prospects of searches for longlived charged particles with MoEDAL
/ Acharya, B.S. (King's Coll. London (main) ; ICTP, Trieste) ; De Roeck, A. (CERN ; Antwerp U.) ; Ellis, J. (King's Coll. London ; CERN ; NICPB, Tallinn) ; Ghosh, D.K. (IACS, Kolkata) ; Masełek, R. (Warsaw U.) ; Panizzo, G. (ICTP, Trieste ; INFN, Trieste) ; Pinfold, J.L. (Alberta U.) ; Sakurai, K. (Warsaw U.) ; Shaa, A. (Warsaw U.) ; Wall, A. (Alabama U.)
We study the prospects of searches for exotic longlived particles with the MoEDAL detector at the LHC, assuming the integrated luminosity of 30 fb$^{1}$ that is expected at the end of Run 3. MoEDAL incorporates nuclear track detectors deployed a few metres away from the interaction point, which are sensitive to any highlyionizing particles. [...]
arXiv:2004.11305; KCLPHTH/202018; CERNTH2020060.
20200625  20 p.
 Published in : Eur. Phys. J. C 80 (2020) 572
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20200402 05:08 
Probes of Gravitational Waves with Atom Interferometers
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Vaskonen, Ville (King's Coll. London ; NICPB, Tallinn)
Atom interferometers (AIs) on earth and in space offer good capabilities for measuring gravitational waves (GWs) in the midfrequency deciHz band, complementing the sensitivities of the LIGO/Virgo and LISA experiments and enabling probes of possible modifications of the general relativity predictions for GW propagation. We illustrate these capabilities using the projected sensitivities of the AION (terrestrial) and AEDGE (spacebased) AI projects, showing that AION could improve the present LIGO/Virgo direct limit on the graviton mass by a factor $\sim 40$ to $\simeq 10^{24}\,$eV, and AEDGE could improve the limit by another order of magnitude. [...]
arXiv:2003.13480; KCLPHTH/202015; CERNTH2020048.
20200610  9 p.
 Published in : Phys. Rev. D 101 (2020) 124013
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20200328 21:20 
Constraints on Standard Model Constructions in Ftheory
/ Cvetic, Mirjam (Pennsylvania U. ; Maribor U.) ; Halverson, James (Northeastern U.) ; Lin, Ling (CERN) ; Long, Cody (Northeastern U. ; Cornell U., Phys. Dept.)
We argue that the following three statements cannot all be true: (i) our vacuum is a type IIB / Ftheory vacuum at moderatetolarge $h^{1,1}$, (ii) the $\alpha'$expansion is controlled via the supergravity approximation, à la the KKLT and LVS scenarios, and (iii) there are no additional gauged sectors from sevenbranes. Since nearly all known globally consistent Ftheory models with the exact chiral spectrum of the Standard Model and gauge coupling unification occur at moderate $h^{1,1}$, this finding calls for new moduli stabilization scenarios or/and a rich sevenbrane dark sector..
arXiv:2004.00630; CERNTH2020049; UPR1304T; UPR1304T.
Geneva : CERN, 20200710  10 p.
 Published in : Phys. Rev. D 102 (2020) 026012
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20200326 04:20 
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20200320 04:36 
Bottom quark mass effects in associated $WH$ production with $H \to b\bar{b}$ decay through NNLO QCD
/ Behring, Arnd (KIT, Karlsruhe) ; Bizoń, Wojciech (Karlsruhe U., ITP ; KIT, Karlsruhe) ; Caola, Fabrizio (Oxford U., Theor. Phys.) ; Melnikov, Kirill (Karlsruhe U., ITP) ; Röntsch, Raoul (CERN)
We present a computation of NNLO QCD corrections to the production of a Higgs boson in association with a $W$ boson at the LHC followed by the decay of the Higgs boson to a $b\bar{b}$ pair. At variance with previous NNLO QCD studies of the same process, we treat $b$ quarks as massive. [...]
arXiv:2003.08321; TTP20011; P3H20009; CERNTH2020043.
20200617  16 p.
 Published in : Phys. Rev. D 101 (2020) 114012
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20200319 04:10 
Gravitational waves from firstorder cosmological phase transitions: lifetime of the sound wave source
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Lewicki, Marek (King's Coll. London ; Warsaw U. (main)) ; No, José Miguel (U. Autonoma, Madrid (main) ; Madrid, IFT)
We survey systematically the general parametrisations of particlephysics models for a firstorder phase transition in the early universe, including models with polynomial potentials both with and without barriers at zero temperature, and ColemanWeinberglike models with potentials that are classically scaleinvariant. We distinguish three possibilities for the transition  detonations, deflagrations and hybrids  and consider sound waves and turbulent mechanisms for generating gravitational waves during the transitions in these models, checking in each case the requirement for successful percolation. [...]
arXiv:2003.07360; KCLPHTH/202004; CERNTH2020016; IFTUAM/CSIC2035.
20200723  33 p.
 Published in : JCAP 2007 (2020) 050
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20200317 04:39 
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