2024-12-21
04:16 |
NNLO fits of top-quark mass using total, single-differential and double-differential $t\bar{t}+X$ cross-section data
/ Alekhin, S. (Hamburg U., Inst. Theor. Phys. II) ; Garzelli, M.V. (Hamburg U., Inst. Theor. Phys. II ; CERN ; Cagliari U.) ; Mazzitelli, J. (PSI, Villigen) ; Moch, S.-O. (Hamburg U., Inst. Theor. Phys. II) ; Zenaiev, O. (Hamburg U., Inst. Theor. Phys. II)
We describe the fits of the top-quark mass value at NNLO using as input the double-differential distributions in rapidity and invariant mass of $t\bar{t}$ pairs obtained by the ATLAS and CMS collaborations from unfolding of their experimental data to the parton level, compared to NNLO theory predictions. We consider different state-of-the-art PDF sets, finding results of the fits compatible among each other within uncertainties. [...]
arXiv:2412.14348; CERN-TH-2024-220.-
2024-12-18 - 4 p.
- Published in : PoS: ICHEP2024 (2024) , pp. 393
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2024-11-01
04:13 |
Event generation with Sherpa 3
/ Sherpa Collaboration
Sherpa is a general-purpose Monte Carlo event generator for the simulation of particle collisions in high-energy collider experiments. We summarise new developments, essential features, and ongoing improvements within the Sherpa 3 release series. [...]
arXiv:2410.22148; IPPP/24/67; LTH-1385; FERMILAB-PUB-24-0748-T; ZU-TH 51/24,
CERN-TH-2024-171; ZU-TH 51/24; MCNET-24-17; CERN-TH-2024-171.-
2024-12-20 - 46 p.
- Published in : JHEP 2412 (2024) 156
Fulltext: 2410.22148 - PDF; ab734587330dddd7c27e53d99cd0646e - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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2024-10-22
04:21 |
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2024-08-28
04:54 |
Gravitational Waves from High Temperature Strings
/ Frey, Andrew R. (Winnipeg U.) ; Mahanta, Ratul (Winnipeg U.) ; Maharana, Anshuman (Harish-Chandra Res. Inst.) ; Quevedo, Fernando (Cambridge U., DAMTP ; CERN ; New York U., Abu Dhabi) ; Villa, Gonzalo (Cambridge U., DAMTP)
We study finite temperature effects in string cosmology and their potential gravitational wave signature. Expanding on our recent work arXiv:2310.11494 , we consider a general configuration of highly excited open and closed strings at high enough temperature to be in the Hagedorn phase in 3+1 dimensions, in order to explore its cosmological implications. [...]
arXiv:2408.13803; CERN-TH-2024-108.-
2024-12-23 - 43 p.
- Published in : JHEP 2412 (2024) 174
Fulltext: 2408.13803 - PDF; document - PDF;
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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
07:13 |
Multiscalar Critical Models with Localised Cubic Interactions
/ Harribey, Sabine (Nordita ; Stockholm U. (main) ; Royal Inst. Tech., Stockholm) ; Pannell, William H. (King's Coll. London, Dept. Math) ; Stergiou, Andreas (King's Coll. London, Dept. Math ; CERN)
Interface localised interactions are studied for multiscalar universality classes accessible with the perturbative $\varepsilon$ expansion in $4-\varepsilon$ dimensions. The associated beta functions at one loop and partially at two loops are derived, and a wide variety of interface conformal field theories (CFTs) is found, even in cases where the bulk universality class is free or as simple as the Wilson-Fisher description of the $O(N)$ model. [...]
arXiv:2407.20326; CERN-TH-2024-122; CERN-TH-2024-122.-
2024-12-12 - 33 p.
- Published in : JHEP 2412 (2024) 092
Fulltext: 2407.20326 - PDF; document - PDF;
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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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