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TH Articles

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Tools for dark matter indirect detection / Cirelli, Marco (CERN ; Saclay, SPhT)
CERN-PH-TH-2012-032.- 2012 - 9 p. - Published in : Frascati Phys. Ser.: 54 (2012) , pp. 32-40
In : LC11: understanding QCD at Linear Colliders in searching for old and new physics, Trento, Italy, 12 - 16 Sep 2011, pp.32-40

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Scale invariant Volkov-Akulov Supergravity / Ferrara, S (CERN ; INFN, Frascati ; UCLA) ; Porrati, M (CERN ; New York U., CCPP) ; Sagnotti, A (CERN ; INFN, Pisa)
A scale invariant Goldstino theory coupled to Supergravity is obtained as a standard supergravity dual of a rigidly scale invariant higher--curvature Supergravity with a nilpotent chiral scalar curvature. The bosonic part of this theory describes a massless scalaron and a massive axion in a de Sitter Universe..
arXiv:1508.02939; CERN-PH-TH-2015-193.- 2015 - 7 p. - Published in : Phys. Lett. B 749 (2015) 589-591 Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint

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Low Q^2 Weak Mixing Angle Measurements and Rare Higgs Decays / Davoudiasl, Hooman (Brookhaven) ; Lee, Hye-Sung (CERN) ; Marciano, William J (Brookhaven)
A weighted average weak mixing angle theta_W derived from relatively low Q^2 experiments is compared with the Standard Model prediction obtained from precision measurements. The approximate 1.8 sigma discrepancy is fit with an intermediate mass (~ 10-35 GeV) "dark" Z boson Z_d, corresponding to a U(1)_d gauge symmetry of hidden dark matter, which couples to our world via kinetic and Z-Z_d mass mixing. [...]
arXiv:1507.00352; CERN-PH-TH-2015-151.- 2015 - 5 p. - Published in : Phys. Rev. D 92 (2015) 055005 Fulltext: PDF; External link: Preprint

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Integrating out lattice gauge fields / Vairinhos, Helvio (ETH, Zurich (main)) ; de Forcrand, Philippe (ETH, Zurich (main) ; CERN)
The sign problem is a major obstacle to our understanding of the phase diagram of QCD at finite baryon density. Several numerical methods have been proposed to tackle this problem, but a full solution to the sign problem is still elusive. [...]
arXiv:1506.07007; CERN-PH-TH-2015-140.- 2015 - 9 p. - Published in : CPOD (2014) , pp. 061 Fulltext: PDF; External link: Preprint

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Mass anomalous dimension of Adjoint QCD at large N from twisted volume reduction / Pérez, Margarita García (U. Autonoma, Madrid (main)) ; González-Arroyo, Antonio (U. Autonoma, Madrid (main) ; Madrid, Autonoma U.) ; Keegan, Liam (CERN) ; Okawa, Masanori (Hiroshima U. (main))
In this work we consider the $SU(N)$ gauge theory with two Dirac fermions in the adjoint representation, in the limit of large $N$. In this limit the infinite-volume physics of this model can be studied by means of the corresponding twisted reduced model defined on a single site lattice. [...]
arXiv:1506.06536; CERN-PH-TH-2015-138; IFT-UAM-CSIC-15-060; FTUAM-15-17; HUPD-1501.- 2015 - 17 p. - Published in : J. High Energy Phys. 08 (2015) 034 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint

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Inflationary magnetogenesis, derivative couplings and relativistic Van der Waals interactions / Giovannini, Massimo (CERN ; INFN, Milan Bicocca)
When the gauge fields have derivative couplings to scalars, like in the case of the relativistic theory of Van der Waals (or Casimir-Polder) interactions, conformal invariance is broken but the magnetic and electric susceptibilities are not bound to coincide. We analyze the formation of large-scale magnetic fields in slow-roll inflation and find that they are generated at the level of a few hundredths of a nG and over typical length scales between few Mpc and $100$ Mpc. [...]
arXiv:1506.04186; CERN-PH-TH-2015-137.- 2015 - 40 p. - Published in : Phys. Rev. D 92 (2015) 043521 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint

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Interplay of flavor and collider physics / Mahmoudi, Farvah (Clermont-Ferrand U. ; CERN)
We present an overview on the interplay between direct searches for new physics at the LHC and indirect constraints from flavor physics, with an emphasis on the implications of the recent LHCb results. The complementarity with the Higgs search results will also be addressed. [...]
CERN-PH-TH-2014-169.- 2014 - 14 p. - Published in : Int. J. Mod. Phys. A 29 (2014) 1444012
In : International conference on Flavor Physics and Mass Generation, Singapore, Singapore, 10 - 14 Feb 2014, pp.1444012

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Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models / Ellis, John (King's Coll. London ; CERN) ; Garcia, Marcos A G (Minnesota U.) ; Nanopoulos, Dimitri V (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A (Minnesota U.)
We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state parameter, $w$, during the epoch of inflaton decay, the reheating temperature, $T_{\rm reh}$, and the number of inflationary e-folds, $N_*$, comparing analytical approximations with numerical calculations. We then illustrate these results with applications to models based on no-scale supergravity and motivated by generic string compactifications, including scenarios where the inflaton is identified as an untwisted-sector matter field with direct Yukawa couplings to MSSM fields, and where the inflaton decays via gravitational-strength interactions. [...]
arXiv:1505.06986; KCL-PH-TH-2015-23; LCTS-2015-13; CERN-PH-TH-2015-122; ACT-04-15; MI-TH-1513; UMN-TH-3438-15; FTPI-MINN-15-26.- 2015 - 33 p. - Published in : J. Cosmol. Astropart. Phys. 07 (2015) 050 Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint

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Precise determination of the Higgs mass in supersymmetric models with vectorlike tops and the impact on naturalness in minimal GMSB / Nickel, Kilian (Bonn U.) ; Staub, Florian (CERN)
We present a precise analysis of the Higgs mass corrections stemming from vectorlike top partners in supersymmetric models. We reduce the theoretical uncertainty compared to previous studies in the following aspects: (i) including the one-loop threshold corrections to SM gauge and Yukawa couplings due to the presence of the new states to obtain the $\bar{\text{DR}}$ parameters entering all loop calculations, (ii) including the full momentum dependence at one-loop, and (iii) including all two-loop corrections but the ones involving $g_1$ and $g_2$. [...]
arXiv:1505.06077; BONN-TH-2015-07; CERN-PH-TH-2015-123.- 2015 - 64 p. - Published in : J. High Energy Phys. 07 (2015) 139 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint

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Beauty-quark and charm-quark pair production asymmetries at LHCb / Gauld, Rhorry (Durham U., IPPP) ; Haisch, Ulrich (Oxford U., Theor. Phys. ; CERN) ; Pecjak, Ben D (Durham U., IPPP) ; Re, Emanuele (Oxford U., Theor. Phys.)
The LHCb collaboration has recently performed a first measurement of the angular production asymmetry in the distribution of beauty quarks and anti-quarks at a hadron collider. We calculate the corresponding standard model prediction for this asymmetry at fixed-order in perturbation theory. [...]
arXiv:1505.02429; CERN-PH-TH-2015-108; DCPT-15-28; IPPP-15-14; OUTP-15-10P.- 2015 - 4.5 p. - Published in : Phys. Rev. D 92 (2015) 034007 Fulltext: PDF; External link: Preprint

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