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2022-07-13
04:01
Flavour Physics Phenomenology with SuperIso / Neshatpour, Siavash (INFN, Naples) ; Mahmoudi, Farvah (IP2I, Lyon ; CERN)
We present an overview of SuperIso v4.1 which is a public program for the calculation of flavour physics observables. We give examples of using SuperIso to constrain new physics scenarios with kaon physics and present the implications of rare B-decays..
arXiv:2207.04956; CERN-TH-2022-119.- 2022-07-14 - 9 p. - Published in : PoS CompTools2021 (2022) 010 Fulltext: 2207.04956 - PDF; document - PDF;
In : Computational Tools for High Energy Physics and Cosmology, Lyon, France, 22 - 26 Nov 2021, pp.010

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2022-05-10
04:20
Higher-curvature Gravities from Braneworlds and the Holographic c-theorem / Bueno, Pablo (CERN) ; Emparan, Roberto (ICREA, Barcelona ; Barcelona, Autonoma U. ; ICC, Barcelona U.) ; Llorens, Quim (ICC, Barcelona U.)
We study the structure of the higher-curvature gravitational densities that are induced from holographic renormalization in AdS$_{d+1}$. In a braneworld construction, such densities define a d-dimensional higher-curvature gravitational theory on the brane, which in turn is dual to a (d-1)-dimensional CFT living at its boundary. [...]
arXiv:2204.13421; CERN-TH-2022-076.- 2022-08-03 - 31 p. - Published in : Phys. Rev. D 106 (2022) 044012 Fulltext: PDF;

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2022-04-28
04:03
Bootstrapping a Stress-Tensor Form Factor through Eight Loops / Dixon, Lance J. (SLAC) ; Gurdogan, Omer (Southampton U.) ; McLeod, Andrew J. (CERN ; UCLA ; Bohr Inst.) ; Wilhelm, Matthias (Bohr Inst.)
We bootstrap the three-point form factor of the chiral stress-tensor multiplet in planar $\mathcal{N}=4$ supersymmetric Yang-Mills theory at six, seven, and eight loops, using boundary data from the form factor operator product expansion. This may represent the highest perturbative order to which multi-variate quantities in a unitary four-dimensional quantum field theory have been computed. [...]
arXiv:2204.11901; SLAC-PUB-17653; CERN-TH-2022-039.- 2022-07-26 - 43 p. - Published in : JHEP 2207 (2022) 153 Fulltext: 2204.11901 - PDF; document - PDF;

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2022-04-23
10:51
Constraints on Multi-Field Inflation from the BOSS Galaxy Survey / Cabass, Giovanni (Princeton, Inst. Advanced Study) ; Ivanov, Mikhail M. (Princeton, Inst. Advanced Study) ; Philcox, Oliver H.E. (Princeton U., Astrophys. Sci. Dept. ; Princeton, Inst. Advanced Study) ; Simonović, Marko (CERN) ; Zaldarriaga, Matias (Princeton, Inst. Advanced Study)
We use redshift-space galaxy clustering data from the BOSS survey to constrain local primordial non-Gaussianity (LPNG). This is of particular importance due to the consistency relations, which imply that a detection of LPNG would rule out all single-field inflationary models. [...]
arXiv:2204.01781; CERN-TH-2022-055.- 2022-08-03 - 20 p. - Published in : Phys. Rev. D 106 (2022) 043506 Fulltext: PDF;

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2022-04-07
04:32
The eikonal operator at arbitrary velocities I: the soft-radiation limit / Di Vecchia, Paolo (Bohr Inst. ; Nordita ; Stockholm U.) ; Heissenberg, Carlo (Nordita ; Stockholm U. ; Uppsala U.) ; Russo, Rodolfo (Queen Mary, U. of London) ; Veneziano, Gabriele (CERN ; College de France)
Observables related to the real part of the gravitational eikonal, such as the deflection angle and time delay, have been found so far to have a smooth post-Minkowskian (PM) expansion whose validity extends from the non-relativistic to the most extreme ultra-relativistic (UR) regime, which smoothly connects with massless particle collisions. To describe gravitational radiation, the eikonal phase has to be promoted to a unitary operator for which we motivate a proposal and start discussing properties in the soft-radiation limit. [...]
arXiv:2204.02378; CERN-TH-2022-058; NORDITA 2022-022; QMUL-PH-22-14; UUITP-20/22.- 2022-07-07 - 31 p. - Published in : JHEP 2207 (2022) 039 Fulltext: document - PDF; 2204.02378 - PDF;

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2022-04-02
04:37
Light-by-Light Scattering at Future $e^+e^-$ Colliders / Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) ; Mavromatos, Nick E. (King's Coll. London ; Natl. Tech. U., Athens) ; Roloff, Philipp (CERN) ; You, Tevong (CERN ; Cambridge U., DAMTP ; Cambridge U.)
We study the sensitivity of possible CLIC and FCC-ee measurements of light-by-light scattering to old and new physics, including the Heisenberg-Euler Lagrangian in the Standard Model with possible contributions from loops of additional charged particles or magnetic monopoles, the Born-Infeld extension of QED, and effective dimension-8 operators involving four electromagnetic field strengths as could appear in the Standard Model Effective Field Theory. We find that FCC-ee measurements at 365 GeV and CLIC measurements at 350 GeV would be sensitive to new physics scales of half a TeV in the dimension-8 operator coefficients, and that CLIC measurements at 1.4 TeV or 3 TeV would be sensitive to new physics scales {$\sim 2$ TeV or 5 TeV} at 95% CL, corresponding to probing loops of new particles with masses up to $\sim 3.7$ TeV {for large charges and/or multiple species}. [...]
arXiv:2203.17111; KCL-PH-TH/2022-02; CERN-TH-2022-011.- 2022-07-23 - 26 p. - Published in : Eur. Phys. J. C Fulltext: document - PDF; 2203.17111 - PDF;

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2022-03-19
08:55
Non-minimally assisted chaotic inflation / Hyun, Sang Chul (Yonsei U. ; IPAP, Seoul) ; Kim, Jinsu (CERN) ; Park, Seong Chan (Yonsei U. ; Korea Inst. Advanced Study, Seoul) ; Takahashi, Tomo (Saga U., Japan)
Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. [...]
arXiv:2203.09201; YHEP-COS22-01; KIAS-P22015; CERN-TH-2022-040.- 2022-05-31 - 11 p. - Published in : JCAP 2205 (2022) 045 Fulltext: document - PDF; 2203.09201 - PDF;

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2022-03-17
05:21
DarkSUSY 6.3 – Freeze-in, out-of-equilibrium freeze-out, cosmic-ray upscattering and further new features / Bringmann, Torsten (Oslo U. ; CERN) ; Edsjö, Joakim (Stockholm U., OKC)
DarkSUSY is a versatile tool for precision calculations of a large variety of dark matter-related signals, ranging from predictions for the dark matter relic density to dark matter self-interactions and rates relevant for direct and indirect detection experiments. In all of these areas significant new code additions have been made in recent years, since the release of DarkSUSY 6 in 2018, which we summarize in this overview. [...]
arXiv:2203.07439; CERN-TH-2022-031.- 2022-07-14 - 17 p. - Published in : PoS CompTools2021 (2022) 038 Fulltext: 2203.07439 - PDF; document - PDF;
In : Computational Tools for High Energy Physics and Cosmology, Lyon, France, 22 - 26 Nov 2021, pp.038

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2022-03-16
04:13
Leveraging universality of jet taggers through transfer learning / Dreyer, Frédéric A. (Oxford U., Theor. Phys.) ; Grabarczyk, Radosław (Oxford U., Theor. Phys.) ; Monni, Pier Francesco (CERN)
A significant challenge in the tagging of boosted objects via machine-learning technology is the prohibitive computational cost associated with training sophisticated models. Nevertheless, the universality of QCD suggests that a large amount of the information learnt in the training is common to different physical signals and experimental setups. [...]
arXiv:2203.06210; OUTP-22-01P; CERN-TH-2022-018.- 2022-06-25 - 10 p. - Published in : Eur. Phys. J. C 82 (2022) 564 Fulltext: 2203.06210 - PDF; document - PDF; Fulltext from publisher: PDF;

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2022-03-10
04:32
One Loop to Rule Them All: Eight and Nine Dimensional String Vacua from Junctions / Cvetič, Mirjam (Pennsylvania U. ; Maribor U. ; CERN) ; Dierigl, Markus (Munich U., ASC) ; Lin, Ling (CERN) ; Zhang, Hao Y. (Pennsylvania U.)
String and 5-brane junctions are shown to succinctly classify all known 8d ${\cal N}$=1 string vacua. This requires an extension of the description for ordinary $[p,q]$-7-branes to consistently include O7$^+$-planes, which then naturally encodes the dynamics of $\mathfrak{sp}_n$ gauge algebras, including their higher-form center symmetries. [...]
arXiv:2203.03644; CERN-TH-2022-032; LMU-ASC 10/22; UPR-1316-T.- 2022-07-15 - 44 p. - Published in : Phys. Rev. D Fulltext: PDF;

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