Publications related to Observation of the Mass Difference Between Neutral Charm-Meson Eigenstates

Related publications (11)

Observation of ηc (1 S,2 S) and χcJ decays to 2 (π+π-)η via ψ (3686) radiative transitions

Based on (2712.4±14.1)×106 ψ(3686) decays collected with the BESIII detector, we have observed, for the first time, the hadronic decays of S- and P-wave charmonium states into 2(π+π-)η via radiative transitions from ψ(3686). The branching fraction of the d ...

2025

Search for the Lepton Number Violation Decay Φ → Π+π+e-e- Via j/ψ → Φη

Yunxuan Song

Using an electron-positron collision data sample corresponding to (1.0087 +/- 0.0044) x 10(10) J/psi events collected using the BESIII detector at the BEPCII collider, we firstly search for the lepton number violation decay phi -> pi(+)pi(+)e(-)e(-) via J/ ...

IOP Publishing Ltd2025

Measurement of the T(t)over-barh and Th Production Rates in the H →b(b)over-bar Decay Channel Using Proton-proton Collision Data at √s=13 Tev

Jan Steggemann, Konstantin Androsov, Anna Mascellani, Joanna Malgorzata Wanczyk

An analysis of the production of a Higgs boson (H) in association with a top quark-antiquark pair (t (t) over barH) or a single top quark (tH) is presented. The Higgs boson decay into a bottom quark-antiquark pair (H -> b (b) over bar) is targeted, and thr ...

SPRINGER2025

Search for Hadronic Decays of Feebly-interacting Particles at Na62

Radoslav Marchevski, Alina Kleimenova, Xiafei Chang

The NA62 experiment at CERN has the capability to collect data in a beam-dump mode, where 400 GeV protons are dumped on an absorber. In this configuration, New Physics particles, including dark photons, dark scalars, and axion-like particles, may be produc ...

SPRINGER2025

Test of lepton flavor universality in B± → K± μ+μ- and B± → K± e+ e- decays in proton-proton collisions at √s=13 TeV

Jan Steggemann, Konstantin Androsov, Anna Mascellani, Joanna Malgorzata Wanczyk

A test of lepton flavor universality in B-+/- -> K +/- mu(+) mu(-) and B-+/- -> (K)+/- e(+) e(-) decays, as well as a measurement of differential and integrated branching fractions of a nonresonant B-+/- -> K-+/- mu(+)mu(-) decay are presented. The analysi ...

IOP Publishing Ltd2024

Search for Leptonic Decays of Dark Photons at NA62

Radoslav Marchevski, Alina Kleimenova

The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays in flight to electron-positron pairs using a sample of 1.4 x 10(17) protons on dump collected in 2021. No evidence for a dark photon signal is observed. The comb ...

American Physical Society (APS)2024

Measurement of the Prompt Decay Constant in a Zero Power Reactor Using a Novel 3D Detector System

Andreas Pautz, Vincent Pierre Lamirand, Oskari Ville Pakari, Michel Saliba

Analyzing neutron noise in zero power reactors is a valuable tool for gaining insights into integral parameters, such as the prompt decay constant α. This information can be used to validate codes that predict said parameters, or time-dependent behavior, p ...

American Nuclear Society2024

Weyl-invariant Einstein-Cartan gravity: unifying the strong CP and hierarchy puzzles

Mikhail Chapochnikov

We show that the minimal Weyl-invariant Einstein-Cartan gravity in combination with the Standard Model of particle physics contains just one extra scalar degree of freedom (in addition to the graviton and the Standard Model fields) with the properties of a ...

Springer Nature2024

Search for physics beyond the standard model in top quark production with additional leptons in the context of effective field theory

Jan Steggemann, Konstantin Androsov, Anna Mascellani, Joanna Malgorzata Wanczyk

A search for new physics in top quark production with additional final-state leptons is performed using data collected by the CMS experiment in proton-proton collisions at root s = 13TeV at the LHC during 2016-2018. The data set corresponds to an integrate ...

Springer Nature2023

First Search for Exclusive Diphoton Production at High Mass with Tagged Protons in Proton-Proton Collisions at root s=13 TeV

Jan Steggemann

A search for exclusive two-photon production via photon exchange in proton-proton collisions, pp -> p gamma gamma p with intact protons, is presented. The data correspond to an integrated luminosity of 9.4 fb(-1) collected in 2016 using the CMS and TOTEM d ...

AMER PHYSICAL SOC2022

Measurement of the cross section for tt¯ production with additional jets and b jets in pp collisions at s√ = 13 TeV

Lesya Shchutska

Measurements of the cross section for the production of top quark pairs in association with a pair of jets from bottom quarks and in association with a pair of jets from quarks of any flavor or gluons and their ratio are presented. The data were collected ...

Springer Nature2020