2024-08-13
05:27 |
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2024-08-08
05:10 |
Overview of $B \to K^{(*)}\ell \ell$ Theoretical Calculations and Uncertainties
/ Mahmoudi, Farvah (IP2I, Lyon ; CERN ; IUF, Paris) ; Monceaux, Yann (IP2I, Lyon)
The search for New Physics (NP) beyond the Standard Model (SM) has been a central focus of particle physics, including in the context of $B$-meson decays involving $b \to s \ell \ell$ transitions. These transitions, mediated by flavour-changing neutral currents, are highly sensitive to small NP effects due to their suppression in the SM. [...]
arXiv:2408.03235; CERN-TH-2024-119.-
2024-08-07 - 23 p.
- Published in : Symmetry: 16 (2024) , no. 8, pp. 1006
Fulltext: 2408.03235 - PDF; document - PDF; Publication - PDF;
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2024-08-03
06:45 |
Four-loop two-mass tadpoles and the $\rho$ parameter
/ Abreu, Samuel (CERN ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Behring, Arnd (CERN) ; McLeod, Andrew J. (CERN ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Page, Ben (CERN ; Gent U.)
We calculate four-loop QCD corrections to the electroweak $\rho$ parameter with a non-vanishing $b$ quark mass. At three loops, it was observed that elliptic integrals contribute to this observable. [...]
arXiv:2407.21700; CERN-TH-2024-129.-
2024-09-17 - 12 p.
- Published in : PoS: LL2024 (2024) , pp. 008
Fulltext: 2407.21700 - PDF; document - PDF;
In : 17th Loops and Legs in Quantum Field Theory (LL 2024), Wittenberg, Germany, 14 - 19 Apr 2024, pp.008
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2024-08-01
06:54 |
Toponium hunter’s guide
/ Aguilar-Saavedra, J.A. (Madrid, IFT)
We address the discovery and characterisation of toponium production at the Large Hadron Collider. In the dilepton decay mode, multivariate analyses of spin and colour observables could provide evidence that an excess of events present near the $t \bar t$ threshold corresponds to a spin-zero colour singlet. [...]
arXiv:2407.20330; IFT-UAM/CSIC-24-112; CERN-TH-2024-123.-
2024-09-01 - 10 p.
- Published in : Phys. Rev. D 110 (2024) 054032
Fulltext: 2407.20330 - PDF; Publication - PDF;
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2024-07-30
04:22 |
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2024-07-18
04:25 |
Personal reminiscences of Steven Weinberg
/ Quevedo, Fernando (Cambridge U., DAMTP ; CERN)
My personal recollections are presented regarding my interactions with Steven Weinberg and the impact he had in my career from when I was his graduate student until the present..
arXiv:2407.10033; CERN-TH-2024-105.-
2024-07-06 - 6 p.
Fulltext: PDF;
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2024-07-16
05:25 |
QCD corrections to Higgs boson production and $H \to b \bar{b}$ decay in weak boson fusion
/ Asteriadis, Konstantin (Regensburg U.) ; Behring, Arnd (CERN) ; Melnikov, Kirill (KIT, Karlsruhe, TTP) ; Novikov, Ivan (KIT, Karlsruhe, TTP) ; Röntsch, Raoul (INFN, Milan ; Milan U.)
We study QCD corrections to the process where a Higgs boson is produced in weak boson fusion and then decays into a pair of massive $b$ quarks. We find that typical experimental criteria used to identify $b$ jets in this process affect QCD corrections to the decay, making it necessary to account for them in the proper description of this process. [...]
arXiv:2407.09363; TTP24-019; P3H-24-040; CERN-TH-2024-095; TIF-UNIMI-2024-5.-
2024-09-01 - 12 p.
- Published in : Phys. Rev. D 110 (2024) 054017
Fulltext: 2407.09363 - PDF; Publication - PDF;
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2024-07-13
04:25 |
Non-universal SUSY models, $g_\mu-2$, $m_H$ and dark matter
/ Ellis, John (King's Coll. London ; CERN) ; Olive, Keith A. (Minnesota U.) ; Spanos, Vassilis C. (Minnesota U. ; Athens U.)
We study the anomalous magnetic moment of the muon, $g_\mu - 2 \equiv 2 a_\mu$, in the context of supersymmetric models beyond the CMSSM, where the unification of either the gaugino masses $M_{1,2,3}$ or sfermion and Higgs masses is relaxed, taking into account the measured mass of the Higgs boson, $m_H$, the cosmological dark matter density and the direct detection rate. We find that the model with non-unified gaugino masses can make a contribution $\Delta a_\mu\sim 20 \times 10^{-10}$ to the anomalous magnetic moment of the muon, for example if $M_{1,2} \sim 600$ GeV and $M_3\sim 8$ TeV. [...]
arXiv:2407.08679; KCL-PH-TH/2024-41; CERN-TH-2024-109; UMN-TH-4325/24; FTPI-MINN-24/16.-
2024-10-28 - 35 p.
- Published in : Eur. Phys. J. C 84 (2024) 1121
Fulltext: 2407.08679 - PDF; document - PDF;
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2024-07-05
05:22 |
The three-loop single-mass heavy flavor corrections to deep-inelastic scattering
/ Ablinger, J. (Linz U., RISC ; OAW, Linz, RICAM) ; Behring, A. (CERN) ; Blümlein, J. (DESY, Zeuthen ; Dortmund U.) ; De Freitas, A. (Linz U., RISC ; DESY, Zeuthen) ; von Manteuffel, A. (Regensburg U.) ; Schneider, C. (Linz U., RISC) ; Schönwald, K. (Zurich U.)
We report on the status of the calculation of the massive Wilson coefficients and operator matrix elements for deep-inelastic scatterung to three-loop order. We discuss both the unpolarized and the polarized case, for which all the single-mass and nearly all two-mass contributions have been calculated [...]
arXiv:2407.02006; CERN-TH-2024-100; ZU-TH 31/24; RISC Report number 24-04; DESY-24-096.-
2024-09-17 - 12 p.
- Published in : PoS LL2024 (2024) 047
Fulltext: document - PDF; 2407.02006 - PDF;
In : 17th Loops and Legs in Quantum Field Theory (LL 2024), Wittenberg, Germany, 14 - 19 Apr 2024, pp.047
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2024-07-03
04:35 |
Towards the next Kira release
/ Lange, Fabian (Zurich U. ; PSI, Villigen) ; Usovitsch, Johann (CERN) ; Wu, Zihao (HIAS, UCAS, Hangzhou)
The reduction of Feynman integrals to a basis of master integrals plays a crucial role for many high-precision calculations and Kira is one of the leading tools for this task. In these proceedings we discuss some of the new features and improvements currently being developed for the next release..
arXiv:2407.01395; ZU-TH 32/24; PSI-PR-24-14; CERN-TH-2024-096.-
2024-09-17 - 13 p.
- Published in : PoS LL2024 (2024) 070
Fulltext: document - PDF; 2407.01395 - PDF;
In : 17th Loops and Legs in Quantum Field Theory (LL 2024), Wittenberg, Germany, 14 - 19 Apr 2024, pp.070
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