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Observation of the rare decay $ \eta\to\mu^{+}\mu^{-}\mathrm{e}^+\mathrm{e}^- $ / CMS Collaboration
A first observation of the rare decay $ \eta\to\mu^{+}\mu^{-}\mathrm{e}^+\mathrm{e}^- $ is reported by the CMS Collaboration at the CERN LHC. [...]
arXiv:2605.00615 ; CMS-BPH-24-001 ; CERN-EP-2026-023 CMS-BPH-24-001 ; CERN-EP-2026-023 ; CMS-BPH-24-001-003. - 2026 - 33.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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Measurement of the top quark pair production cross section in $ \mathrm{Pb}\mathrm{Pb} $ collisions at$ \sqrt{\smash[b]{s_{_{\mathrm{NN}}}}}= $ 5.36 TeV / CMS Collaboration
The inclusive cross section for top quark pair ( $ \mathrm{t} \overline{\mathrm{t}} $) production in lead-lead ($ \mathrm{Pb}\mathrm{Pb} $) collisions is reported for the first time at a center-of-mass energy per nucleon pair of 5.36 TeV. [...]
arXiv:2604.27091 ; CMS-HIN-24-021 ; CERN-EP-2026-066 ; CMS-HIN-24-021-003. - 2026 - 49.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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Study of $t\bar{t}$ threshold effects in $e\mu$ differential distributions measured in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration
The recent ATLAS measurement of the normalised $e\mu$ dilepton invariant mass and azimuthal angle distributions in $\sqrt{s}=13$ TeV $pp$ collisions at the Large Hadron Collider is extended to study the sensitivity to the formation of quasi-bound states near the $t\bar{t}$ threshold. [...]
arXiv:2605.02341 ; CERN-EP-2026-107. - 2026 - 32.
Fulltext - Previous draft version - Fulltext

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Measurement of the $ \mathrm{Z} \to \mu^{+}\mu^{-} $ angular coefficients in pp collisions at $ \sqrt{s} = $ 13 TeV as functions of transverse momentum and rapidity / CMS Collaboration
A measurement of the eight angular polarization coefficients, $ A_0 $ to $ A_7 $, in the cross section for the Drell--Yan production of two muons is presented. [...]
arXiv:2604.25678 ; CMS-SMP-23-007 ; CERN-EP-2026-099 ; CMS-SMP-23-007-003. - 2026 - 41.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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Simultaneous measurements of $ N $-subjettiness observables in jets from gluons and light-flavour quarks, and in decays of boosted W bosons and top quarks / CMS Collaboration
A simultaneous measurement of 25 substructure observables is presented using large-radius jets with high transverse momentum from proton-proton collisions at $ \sqrt{s}= $ 13 TeV. [...]
arXiv:2604.25538 ; CMS-SMP-22-003 ; CERN-EP-2025-294 ; CMS-SMP-22-003-003. - 2026 - 115.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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Measurement of jet photoproduction in ultra-peripheral Pb+Pb collisions without nuclear breakup at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV with the ATLAS detector / ATLAS Collaboration
In ultra-relativistic heavy ion collisions at the LHC, each nucleus acts as a source of high-energy quasi-real photons that can participate in scattering processes without causing either participating nucleus to break up and emit forward neutrons. [...]
arXiv:2604.24435 ; CERN-EP-2026-125. - 2026 - 44.
Fulltext - Previous draft version - Fulltext

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Observation of a new excited charm-strange meson $D_{s1}(2933)^+$ in $B^0 \to D^+D^-K^+\pi^-$ decays / LHCb Collaboration
A new excited charm-strange meson is observed through an amplitude analysis of the full phase space of $B^0\to D^+ D^- K^+ \pi^-$ decays. [...]
arXiv:2604.21257 ; LHCb-PAPER-2025-073 ; CERN-EP-2026-065 ; LHCB-PAPER-2025-073. - 2026 - 24.
Fulltext - Related data file(s) - Fulltext

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Observation of impact parameter dependent modifications of nuclear parton distributions in photonuclear Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV with the ATLAS detector / ATLAS Collaboration
High-energy photonuclear ($\gamma+A$) scattering in ultra-peripheral heavy-ion collisions provides a unique probe of nuclear structure. [...]
arXiv:2604.20559 ; CERN-EP-2026-095. - 2026 - 33.
Fulltext - Previous draft version - Fulltext

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Observation of the doubly charmed baryon $\it{\Xi}_{cc}^+$ with the LHCb Run 3 detector / LHCb Collaboration
The first observation of the doubly charmed baryon $\it{\Xi}_{cc}^+$ is reported through its decay to the $\it{\Lambda}_c^+ K^-\pi^+$ final state, with a statistical significance exceeding seven standard deviations. [...]
arXiv:2603.28456 ; LHCb-PAPER-2026-009 ; CERN-EP-2026-085 ; LHCB-PAPER-2026-009. - 2026 - 24.
Fulltext - Related data file(s) - Supplementary information - Fulltext

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Measurement of isolated-prompt photon-hadron correlations in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV / Ali Hassan Abdallah, Dana (Wayne State U.) ; Abualrob, Ibrahim Jaser (Houston U.) ; Acharya, Shreyasi (INFN, Bari) ; Agarwal, Kshitij (Trieste U. ; INFN, Trieste) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahuja, Ishaan (Kosice U.) et al.
The ALICE Collaboration has measured the azimuthal correlation between trigger isolated-prompt photons and associated charged hadrons in Pb-Pb collisions at the CERN LHC, at a centre-of-mass energy per nucleon pair of $\sqrt{s_{\rm NN}} = 5.02$ TeV. The trigger isolated-prompt photons are measured in the transverse-momentum range $18 < p_{\rm T}^\gamma < 40$ GeV/$c$ and pseudorapidity range $|\eta^\gamma| < 0.67$. [...]
arXiv:2605.02342; CERN-EP-2026-127.- Geneva : CERN, 2026 - 25 p. Draft (restricted): PDF; Fulltext: main - PDF; 2605.02342 - PDF;

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