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2024-09-17
18:04
Measurements of polarization and spin correlation and observation of entanglement in top quark pairs using lepton+jets events from proton-proton collisions at $ \sqrt{s}= $ 13 TeV
Measurements of the polarization and spin correlation in top quark pairs ($ \mathrm{t} \overline{\mathrm{t}} $) are presented using events with a single electron or muon and jets in the final state. [...]
CERN-EP-2024-231 ; CMS-TOP-23-007-003. - 2024.
Additional information for the analysis - CMS AuthorList - Fulltext - CMS HEPData

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2024-09-17
05:10
Physics program and performance of the ALICE Forward Calorimeter upgrade (FoCal) / Huhta, Laura Maria
The FoCal is a high-granularity forward calorimeter to be installed as an ALICE upgrade subsystem during the LHC Long Shutdown 3 and take data during the LHC Run 4. [...]
arXiv:2409.08983. - 5 p.
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2024-09-17
05:07
Global analysis of charm mixing parameters and determination of the CKM angle $\gamma$ / Betti, F. (U. Edinburgh (main)) ; Bona, M. (Queen Mary, U. of London) ; Ciuchini, M. (INFN, Rome3) ; Derkach, D. (Higher Sch. of Economics, Moscow) ; Di Palma, R. (INFN, Rome3 ; Rome III U.) ; Kagan, A.L. (Cincinnati U.) ; Lubicz, V. (INFN, Rome3 ; Rome III U.) ; Martinelli, G. (INFN, Rome) ; Pierini, M. (CERN) ; Silvestrini, L. (INFN, Rome) et al.
We present an updated global analysis of beauty decays sensitive to the angle $\gamma$ of the Cabibbo-Kobayashi-Maskawa matrix and of $D$-meson mixing data in the framework of approximate universality for charm mixing. [...]
arXiv:2409.06449. - 21 p.
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2024-09-17
05:07
Discovery Opportunities with Gravitational Waves -- TASI 2024 Lecture Notes / Domcke, Valerie (CERN)
Recent advancements in gravitational wave astronomy hold the promise of a completely new way to explore our Universe [...]
CERN-TH-2024-152 ; arXiv:2409.08956. - 31 p.
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2024-09-17
04:56
A collinear shower algorithm for NSL non-singlet fragmentation / van Beekveld, Melissa (NIKHEF, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Monash U.) ; Helliwell, Jack (Oxford U., Theor. Phys.) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; Oxford U.)
We formulate a collinear partonic shower algorithm that achieves next-to-single-logarithmic (NSL, $\alpha_s^n L^{n-1}$) accuracy for collinear-sensitive non-singlet fragmentation observables. [...]
CERN-TH-2024-125 ; Nikhef 2024-013 ; OUTP-24-05P ; arXiv:2409.08316. - 22 p.
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2024-09-16
16:45
Recent results in hadron spectroscopy from CMS / Mastrapasqua, Vincenzo (INFN, Bari ; Bari U.) /CMS Collaboration
The present report summarizes recent results on the heavy flavor spectroscopy at the CMS experiment obtained using data collected at the Large Hadron Collider during the 2015-2018 data taking with proton-proton collisions at centre-of-mass energy of 13 TeV the results range from the observation of new structures in the di-charmonium mass spectrum to the observation of new decay modes of beauty baryons such as $\Xi_b^-$ and $\Lambda_b^0$..
CMS-CR-2024-163.- Geneva : CERN, 2024 - 8 p. Fulltext: PDF;
In : 11th International Workshop on QCD - Theory and Experiment (QCD@Work 2024), Trani, Italy, 18 - 21 Jun 2024

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2024-09-14
04:38
Two-loop amplitudes for $\mathcal{O}(\alpha_s^2)$ corrections to $W\gamma\gamma$ production at the LHC / Badger, Simon (INFN, Turin) ; Hartanto, Heribertus Bayu (APCTP, Pohang ; POSTECH) ; Wu, Zihao (HIAS, UCAS, Hangzhou ; Unlisted, CN) ; Zhang, Yang (Hefei, CUST ; PCFT, Hefei) ; Zoia, Simone (PCFT, Hefei)
We present the two-loop helicity amplitudes contributing to the next-to-next-to-leading order QCD predictions for W-boson production in association with two photons at the Large Hadron Collider. [...]
CERN-TH-2024-146 ; USTC-ICTS/PCFT-24-29 ; arXiv:2409.08146. - 31 p.
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2024-09-13
04:51
HEP Benchmark Suite: Enhancing Efficiency and Sustainability in Worldwide LHC Computing Infrastructures / Szczepanek, Natalia (CERN) ; Britton, David (Glasgow U.) ; Di Girolamo, Alessandro (CERN) ; Ketele, Ewoud (CERN) ; Glushkov, Ivan (Texas U., Arlington) ; Giordano, Domenico (CERN) ; Ondris, Ladislav (CERN) ; Simili, Emanuele (Glasgow U.) ; Borge, Gonzalo Menendez (CERN)
As the scientific community continues to push the boundaries of computing capabilities, there is a growing responsibility to address the associated energy consumption and carbon footprint. [...]
arXiv:2408.12445. - 8 p.
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2024-09-13
04:51
Broadband Multi-wavelength Properties of M87 during the 2018 EHT Campaign including a Very High Energy Flaring Episode / Event Horizon Telescope Multi-wavelength Science Collaboration
The nearby elliptical galaxy M87 contains one of the only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (EHT). [...]
arXiv:2404.17623. - 46 p.
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2024-09-12
04:37
Theoretical implications for a new measurement of $K_L\to \pi^0 \ell\ell$ / D'Ambrosio, G. (Guglielmo Marconi U. ; U. Rome 2, Tor Vergata (main) ; INFN, Naples) ; Iyer, A.M. (Indian Inst. Tech., New Delhi ; IP2I, Lyon) ; Mahmoudi, F. (IP2I, Lyon ; CERN ; IUF, Paris) ; Neshatpour, S. (IP2I, Lyon)
Kaon physics is at an important experimental juncture with respect to the ongoing measurements of several observables. [...]
CERN-TH-2024-150 ; arXiv:2409.06545. - 14 p.
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