CERN Accelerating science

CERN Document Server 72 record trovati  1 - 10successivofine  salta al record: La ricerca ha impiegato 0.78 secondi. 
1.
Observation of VVZ production at s=13 TeV with the ATLAS detector / ATLAS Collaboration
A search for the production of three massive vector bosons, VVZ(V=W,Z), in proton–proton collisions at s=13 TeV is performed using data with an integrated luminosity of 140 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. Events produced in the leptonic final states WWZ→ℓνℓνℓℓ (ℓ=e,μ), WZZ→ℓνℓℓℓℓ, ZZZ→ℓℓℓℓℓℓ, and the semileptonic final states WWZ→qqℓνℓℓ and WZZ→ℓνqqℓℓ, are analysed. [...]
2025 - 27 p. - Published in : Phys. Lett. B 866 (2025) 139527 Fulltext: PDF;
2.
Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in $\sqrt{s}$=13 TeV proton–proton collisions with the ATLAS detector / ATLAS Collaboration
A search for a pseudoscalar $a$ produced in association with a top-quark pair, or in association with a single top quark plus a $W$ boson, with the pseudoscalar decaying into $b$-quarks ($a\rightarrow b\bar{b}$), is performed using the full Run 2 data sample using a dileptonic decay mode signature. The search covers pseudoscalar boson masses between 12-100 GeV and involves both the kinematic regime where the decay products of the pseudoscalar are reconstructed as two standard $b$-tagged small-radius jets, or merged into a large-radius jet due to its Lorentz boost. [...]
arXiv:2503.17254; CERN-EP-2025-060.- Geneva : CERN, 2025-08-19 - 36 p. - Published in : Eur. Phys. J. C 85 (2025) 886 Fulltext: ANA-HMBS-2024-46-PAPER - PDF; 2503.17254 - PDF; document - PDF; External link: Previous draft version
3.
Improved reconstruction of highly boosted $\tau $-lepton pairs in the $\tau \tau \rightarrow (\mu \nu _{\mu }\nu _{\tau })(\text {hadrons}+\nu _{\tau })$ decay channels with the ATLAS detector / ATLAS Collaboration
This paper presents a new $\tau$-lepton reconstruction and identification procedure at the ATLAS detector at the Large Hadron Collider, which leads to significantly improved performance in the case of physics processes where a highly boosted pair of $\tau$-leptons is produced and one $\tau$-lepton decays into a muon and two neutrinos ($\tau_{\mu}$), and the other decays into hadrons and one neutrino ($\tau_{had}$). By removing the muon information from the signals used for reconstruction and identification of the $\tau_{had}$ candidate in the boosted pair, the efficiency is raised to the level expected for an isolated $\tau_{had}$. [...]
arXiv:2412.14937; CERN-EP-2024-289.- Geneva : CERN, 2025-06-27 - 44 p. - Published in : Eur. Phys. J. C 85 (2025) 706 Fulltext: 2412.14937 - PDF; document - PDF; External link: Previous draft version
4.
Cross-section measurements for the production of a $W$-boson in association with high-transverse-momentum jets in $pp$ collisions at $\sqrt{s}$= 13 TeV with the ATLAS detector / ATLAS Collaboration
A set of measurements for the production of a $W$-boson in association with high-transverse-momentum jets is presented using 140 fb$^{-1}$ of proton-proton collision data at a centre-of-mass energy of $\sqrt{s}=13$ TeV collected by the ATLAS detector at the LHC. The measurements are performed in final states in which the $W$-boson decays into an electron or muon plus a neutrino and is produced in association with jets with $p_{\text{T}}>30$ GeV, where the leading jet has $p_{\text{T}}>500$ GeV. [...]
arXiv:2412.11644; CERN-EP-2024-277.- Geneva : CERN, 2025-07-04 - 51 p. - Published in : Eur. Phys. J. C 85 (2025) 738 Fulltext: 2412.11644 - PDF; document - PDF; External link: Previous draft version
5.
Precision measurement of the $B^{0}$ meson lifetime using $B^{0} \rightarrow J/\psi K^{*0}$ decays with the ATLAS detector / ATLAS Collaboration
A measurement of the $B^{0}$ meson lifetime and related properties using $B^0 \to J/\psi K^{*0}$ decays in data from 13 TeV proton-proton collisions with an integrated luminosity of 140 fb$^{-1}$ recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is $$ \tau = 1.5053 \pm 0.0012 ~\mathrm{(stat.)} \pm 0.0035 ~\mathrm{(syst.)~ps}. [...]
arXiv:2411.09962; CERN-EP-2024-279.- Geneva : CERN, 2025-07-03 - 39 p. - Published in : Eur. Phys. J. C 85 (2025) 736 Fulltext: 2411.09962 - PDF; document - PDF; External link: Previous draft version
6.
Reconstruction and identification of pairs of collimated $\tau$-leptons decaying hadronically using $\sqrt{s}=13$ TeV $pp$ collision data with the ATLAS detector / ATLAS Collaboration
This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying $\tau$-lepton pair with low transverse momentum. When two $\tau$-leptons are highly collimated, their visible decay products might overlap, degrading the reconstruction performance for each of the $\tau$-leptons. [...]
arXiv:2411.09357; CERN-EP-2024-267.- Geneva : CERN, 2025-05-22 - 49 p. - Published in : Eur. Phys. J. C 85 (2025) 561 Fulltext: 2411.09357 - PDF; document - PDF; External link: Previous draft version
7.
A precise measurement of the jet energy scale derived from single-particle measurements and in situ techniques in proton-proton collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector / ATLAS Collaboration
The jet energy calibration and its uncertainties are derived from measurements of the calorimeter response to single particles in both data and Monte Carlo simulation using proton-proton collisions at $\sqrt{s} = 13$ TeV collected with the ATLAS detector during Run 2 at the Large Hadron Collider. The jet calibration uncertainty for anti-k$_t$ jets with a jet radius parameter of $R = 0.4$ and in the central jet rapidity region is about 2.5% for transverse momenta ($p_T$) of 20 GeV, about 0.5% for $p_T = 300$ GeV and 0.7% for $p_T = 4$ TeV. [...]
arXiv:2407.15627; CERN-EP-2024-195.- Geneva : CERN, 2025-09-01 - 48 p. - Published in : Eur. Phys. J. C 85 (2025) 927 Fulltext: ANA-JETM-2022-06-PAPER - PDF; 2407.15627 - PDF; document - PDF; External link: Previous draft version
8.
Measurement of the Lund jet plane in hadronic decays of top quarks and $W$ bosons with the ATLAS detector / Aad, Georges (Marseille, CPPM) ; Aakvaag, Erlend (Bergen U.) ; Abbott, Braden Keim (Oklahoma U.) ; Abdelhameed, Sara (New York U., Abu Dhabi) ; Abeling, Kira (Gottingen U., II. Phys. Inst.) ; Abicht, Nils Julius (Dortmund U.) ; Abidi, Haider (Brookhaven) ; Aboelela, Mohammed (Southern Methodist U.) ; Aboulhorma, Asmaa (Mohammed V U., Agdal) ; Abramowicz, Halina (Tel Aviv U.) et al.
The Lund jet plane (LJP) is measured for the first time in tt̄ events, using 140 fb$^{-1}$ of $\sqrt{s} = 13$ TeV pp collision data collected with the ATLAS detector at the LHC. The LJP is a two-dimensional observable of the sub-structure of hadronic jets that acts as a proxy for the kinematics of parton showers and hadron formation. [...]
arXiv:2407.10879; CERN-EP-2024-169.- Geneva : CERN, 2025-04-14 - 60 p. - Published in : Eur. Phys. J. C 85 (2025) 416 Fulltext: 2407.10879 - PDF; document - PDF; External link: Previous draft version
9.
Search for a light charged Higgs boson in $t \rightarrow H^{\pm } b$ decays, with $H^{\pm } \rightarrow cs$, in $pp$ collisions at $\sqrt{s}={13}\hbox { TeV}$ with the ATLAS detector / ATLAS Collaboration
A search for a light charged Higgs boson produced in decays of the top quark, $t \to H^\pm b$ with $H^\pm \to cs$, is presented. This search targets the production of top-quark pairs $t\bar{t} \to Wb H^\pm b$, with $W \to \ell\nu$ ($\ell = e, \mu$), resulting in a lepton-plus-jets final state characterised by an isolated electron or muon and at least four jets. [...]
arXiv:2407.10096; CERN-EP-2024-185.- Geneva : CERN, 2025-02-06 - 34 p. - Published in : Eur. Phys. J. C 85 (2025) 153 Fulltext: 2407.10096 - PDF; document - PDF; External link: Previous draft version
10.
Search for light neutral particles decaying promptly into collimated pairs of electrons or muons in pp collisions at $\sqrt{s}$ = 13 $\text {T}\text {e}\hspace{-1.00006pt}\text {V}$ with the ATLAS detector / ATLAS Collaboration
A search for a dark photon, a new light neutral particle, which decays promptly into collimated pairs of electrons or muons is presented. The search targets dark photons resulting from the exotic decay of the Standard Model Higgs boson, assuming its production via the dominant gluon-gluon fusion mode. [...]
arXiv:2407.09168; CERN-EP-2024-183.- 2025-03-24 - 44 p. - Published in : Eur. Phys. J. C 85 (2025) 335 Fulltext: 2407.09168 - PDF; document - PDF; External link: Previous draft version

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