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2024-12-21
04:26
Discriminating between Pseudoscalar Higgs and Toponium States at the LHC and Beyond / Djouadi, Abdelhak (Annecy, LAPP ; Granada U., Theor. Phys. Astrophys.) ; Ellis, John (King's Coll. London ; CERN) ; Quevillon, Jeremie (Annecy, LAPP)
We discuss ways to discriminate at hadron colliders between a quasi-bound toponium state and a pseudoscalar Higgs boson A, as predicted in many extensions of the Standard Model. [...]
KCL-PH-TH/2024-77 ; CERN-TH-2024-219 ; arXiv:2412.15138. - 14.
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2024-12-21
04:24
On Determining $\alpha_s(m_Z)$ from Dijets in $e^+e^-$ Thrust / Benitez, Miguel A. (Salamanca U., IUFFyM) ; Hoang, Andre H. (Vienna U.) ; Mateu, Vicent (Salamanca U., IUFFyM) ; Stewart, Iain W. (Vienna U. ; MIT) ; Vita, Gherardo (CERN)
We update a previous N$^3$LL$^\prime$+${\cal O}(\alpha_s^3)$ determination of the strong coupling from a global fit to thrust data by including newly available perturbative ingredients, upgrading the renormalization scales to include a fully canonical scaling region, and implementing the log resummation in a way which ensures the integrated cross section is unaffected by the the leading $1/Q$ hadronization power corrections. [...]
MIT-CTP 5746 ; CERN-TH-2024-142 ; UWThPh2024-8 ; arXiv:2412.15164. - 66.
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2024-12-21
04:21
On the Interplay of Constraints from $B_s$, $D$, and $K$ Meson Mixing in $Z^\prime$ Models with Implications for $b\to s \nu\bar\nu$ Transitions / Buras, Andrzej J. (TUM-IAS, Munich) ; Stangl, Peter (CERN)
Within $Z^\prime$ models, neutral meson mixing severely constrains beyond the Standard Model (SM) effects in flavour changing neutral current (FCNC) processes. [...]
AJB-24-3 ; CERN-TH-2024-218 ; arXiv:2412.14254. - 63.
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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. ; Garzelli, M.V. ; Mazzitelli, J. ; Moch, S.-O. ; Zenaiev, O.
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. [...]
CERN-TH-2024-220 ; arXiv:2412.14348. -
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2024-12-20
05:23
$B_c \to \eta_c$ form factors at large recoil: Interplay of soft-quark and soft-gluon dynamics / Bell, Guido (Siegen U.) ; Böer, Philipp (CERN) ; Feldmann, Thorsten (Siegen U.) ; Horstmann, Dennis (Siegen U.) ; Shtabovenko, Vladyslav (Siegen U.)
We perform an all-order analysis of double-logarithmic corrections to the so-called soft-overlap contribution to heavy-to-light transition form factors at large hadronic recoil. [...]
CERN-TH-2024-206 ; SI-HEP-2024-26 ; P3H-24-093 ; arXiv:2412.14149. - 39.
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2024-12-19
05:21
Field Redefinitions Can Be Nonlocal / Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; Oregon U.) ; Forslund, Matthew (YITP, Stony Brook ; Brookhaven) ; Helset, Andreas (CERN)
We revisit the lore establishing the allowed space of field redefinitions and show that there are essentially no restrictions. [...]
CERN-TH-2024-216 ; YITP-SB-2024-35 ; arXiv:2412.12247. - 36.
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2024-12-17
04:29
Effective temperatures of the QGP from thermal photon and dilepton production / Massen, Olaf (Utrecht U. ; NIKHEF, Amsterdam) ; Nijs, Govert (CERN) ; Sas, Mike (Utrecht U. ; NIKHEF, Amsterdam ; CERN) ; van der Schee, Wilke (NIKHEF, Amsterdam ; CERN ; Utrecht U.) ; Snellings, Raimond (Utrecht U. ; NIKHEF, Amsterdam)
Thermal electromagnetic radiation is emitted by the quark-gluon plasma (QGP) throughout its space-time evolution, with production rates that depend characteristically on the temperature. [...]
CERN-TH-2024-213 ; arXiv:2412.09671. - 13.
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2024-12-14
04:53
Interpolating amplitudes / Bresó, Víctor (U. Heidelberg, ITP) ; Heinrich, Gudrun (KIT, Karlsruhe, TP) ; Magerya, Vitaly (CERN) ; Olsson, Anton (KIT, Karlsruhe, TP)
While the calculation of scattering amplitudes at higher orders in perturbation theory has reached a high degree of maturity, their usage to produce physical predictions within Monte Carlo programs is often hampered by the slow evaluation of the multi-loop amplitudes, especially so for amplitudes calculated numerically. [...]
CERN-TH-2024-211 ; KA-TP-23-2024 ; P3H-24-092 ; arXiv:2412.09534. - 43.
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2024-12-12
04:54
In Search of an Invisible $Z^\prime$ / Davighi, Joe (CERN)
We consider extending the Standard Model by an anomaly-free and possibly flavour non-universal $U(1)_X$ gauge symmetry, whose breaking gives a $Z^\prime$ boson that does not affect electroweak precision observables at tree-level or at 1-loop. [...]
CERN-TH-2024-212 ; arXiv:2412.07694. - 31.
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2024-12-07
04:40
Finiteness and the Emergence of Dualities / Delgado, Matilda (Garching, Max Planck Inst. ; Harvard U., Phys. Dept.) ; van de Heisteeg, Damian (Harvard U., Phys. Dept.) ; Raman, Sanjay (Harvard U., Phys. Dept.) ; Torres, Ethan (CERN) ; Vafa, Cumrun (Harvard U., Phys. Dept.) ; Xu, Kai (Harvard U., Phys. Dept.)
We argue that the finiteness of quantum gravity (QG) amplitudes in fully compactified theories (at least in supersymmetric cases) leads to a bottom-up prediction for the existence of non-trivial dualities. [...]
MPP-2024-224 ; CERN-TH-2024-204 ; arXiv:2412.03640. - 57.
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