Recherche

Afficher tous les résultats pour

Accueil

Personne

Yunxuan Song

Cette personne a quitté l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (132)

Page 3 sur 7

Measurement of Σ+ transverse polarization in e+e- ecollisions at √s=3.68-3.71 GeV

Yunxuan Song

Using e(+)e(-) collision data collected with the BESIII detector at seven energy points ranging from 3.68 to 3.71 GeV and corresponding to an integrated luminosity of 652.1 pb(-1), we present an energy-dependent measurement of the transverse polarization, ...

SPRINGER2024

Observation of the decays B(s)0 → D(s1)(2536)∓K±

Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Sebastian Schulte, Donal Patrick Hill, Marie Theres Christin Bachmayer, Lino Ferreira Lopes, Serhii Cholak, Veronica Sølund Kirsebom, Ettore Zaffaroni, Surapat Ek-In, Aravindhan Venkateswaran, Sara Celani, Renato Quagliani, Luis Miguel Garcia Martin, Yunxuan Song, Vitalii Lisovskyi, Carina Trippl, Sonia Amina Bouchiba, Elisabeth Maria Niel, Federico Ronchetti, Anni Matilda Kauniskangas, Dimitrios Kaminaris, Raphaël van Laak, Maarten Willibrord Uriël Van Dijk, Maria Carolina Feliciano Faria, Louis André Marie Jean Henry

This paper reports the observation of the decays B(s)(0) → D(s1)(2536)∓K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb(-1). The branching fractions of these decays are measured relat ...

Springer Nature2023

Study of the semileptonic decay $ {D}^0\to {\overline{K}}^0{\pi}^{-}{e}^{+}{\nu}_e $

Yunxuan Song

We report an improved study of the semileptonic decay

{D}^0\to {\overline{K}}^0{\pi}^{-}{e}^{+}{\nu}_e

based on a sample of 7.9 fb − 1 of e + e − annihilation data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII ...

Springer2025

Measurement of the multiplicity dependence of Υ production ratios in pp collisions at $ \sqrt{s} $ = 13 TeV

Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Marie Theres Christin Bachmayer, Serhii Cholak, Ettore Zaffaroni, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Yunxuan Song, Vitalii Lisovskyi, Sonia Amina Bouchiba, Federico Ronchetti, Radoslav Marchevski, Anni Matilda Kauniskangas, Dimitrios Kaminaris, Raphaël van Laak, Pierre Paul Louis Mayencourt, Arnaud Merlin Gauthey, Gianluca Zunica, Abdul-Kerim Guseinov, Roberto Ribatti, Spencer Edward Collaviti, Julius Christian Daniel Schulte

The Υ(2S) and Υ(3S) production cross-sections are measured relative to that of the Υ(1S) meson, as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy of 13 TeV. The measurement uses data collected by the LHCb ...

Springer Science and Business Media LLC2025

Study of Bc+ → χc π+ decays

Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Sebastian Schulte, Donal Patrick Hill, Marie Theres Christin Bachmayer, Serhii Cholak, Ettore Zaffaroni, Surapat Ek-In, Aravindhan Venkateswaran, Renato Quagliani, Luis Miguel Garcia Martin, Yunxuan Song, Vitalii Lisovskyi, Sonia Amina Bouchiba, Elisabeth Maria Niel, Federico Ronchetti, Radoslav Marchevski, Anni Matilda Kauniskangas, Dimitrios Kaminaris, Raphaël van Laak, Pierre Paul Louis Mayencourt, Gianluca Zunica, Abdul-Kerim Guseinov, Esteban Curras Rivera, Maria Carolina Feliciano Faria

A study of B-c(+) -> chi(c) pi(+) decays is reported using proton-proton collision data, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13TeV, corresponding to an integrated luminosity of 9 fb(-1). The decay B-c(+) -> chi(c2)pi(+) ...

Springer Nature2024

Study of the light scalar a0 (980) through the decay D0 →a0 (980)-e+νe with a0 (980)- →ηπ

Yunxuan Song

Using 7.93 fb-1 of e+e- collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we present an analysis of the decay D0→ηπ-e+νe. The branching fraction of the decay D0→a0(980)-e+νe with a0(980)-→ηπ- is measured to be (0.86 ...

2025

Measurement of the branching fraction of Ds+ → l+νl via e+e- → Ds+Ds-

Yunxuan Song

Based on 10.64 fb(-1) of ethorne- collision data taken at center-of-mass energies between 4.237 and 4.699 GeV with the BESIII detector, we study the leptonic D-s(+) decays using the e(+)e(-) -> D-sD-+(s)(-) process. The branching fractions of D-s(+) -> l ...

American Physical Society2024

Search for the Leptonic Decay d+ →e+ Νe

Yunxuan Song

We search for the leptonic decay D+ -> e(+)nu(e) using an e(+)e(-) collision data sample with an integrated luminosity of 20.3 fb(-1) collected with the BESIII detector at a center-of-mass energy of 3.773 GeV. Significant signal is not observed, and an upp ...

IOP Publishing Ltd2025

Test of Lepton Universality and Measurement of the Form Factors of D0 →k∗ (892)-μ+νμ

Yunxuan Song

One of the main goals of studying semileptonic decays in flavor physics is to gain a better understanding of hadronic transitions in the nonperturbative region of Quantum Chromodynamics. This involves measuring Cabibbo-Kobayashi-Maskawa matrix elements, un ...

American Physical Society (APS)2025

Measurements of ψ(2S) and χc1(3872) production within fully reconstructed jets

Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Sebastian Schulte, Donal Patrick Hill, Marie Theres Christin Bachmayer, Serhii Cholak, Ettore Zaffaroni, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Yunxuan Song, Vitalii Lisovskyi, Sonia Amina Bouchiba, Elisabeth Maria Niel, Federico Ronchetti, Radoslav Marchevski, Anni Matilda Kauniskangas, Dimitrios Kaminaris, Raphaël van Laak, Pierre Paul Louis Mayencourt, Andrea Merli, Gianluca Zunica, Abdul-Kerim Guseinov, Roberto Ribatti

This paper presents the first measurement of ψ(2S) and χc1(3872) meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its decay to the J/ψ(→μ+μ−)π+π− final state in the forward region using proton-proton collis ...

Springer Science and Business Media LLC2025

Study of the decays χcJ → Λ(Λ)over-barω

Yunxuan Song

Using (27.12 +/- 0.14) x 10(8) psi(3686) events collected with the BESIII detector, we present the first observation of the decays chi(cJ) -> Lambda(Lambda) over bar omega, where J = 0, 1, 2, with statistical significances of 11.7s, 11.2s, and 11.8s. The b ...

American Physical Society2024

Search for the radiative transition χc1 (3872) → γψ2(3823)

Yunxuan Song

Using 9.0 fb(-1) of e(+)e(-) collision data collected at center-of-mass energies from 4.178 to 4.278 GeV with the BESIII detector at the BEPCII collider, we perform the first search for the radiative transition chi(c1) (3872) -> chi psi(3823). No signal is ...

American Physical Society2024

Observation of the Very Rare Σ^{+}→pμ^{+}μ^{-} Decay

Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Marie Theres Christin Bachmayer, Ettore Zaffaroni, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Yunxuan Song, Vitalii Lisovskyi, Federico Ronchetti, Radoslav Marchevski, Anni Matilda Kauniskangas, Dimitrios Kaminaris, Raphaël van Laak, Pierre Paul Louis Mayencourt, Brianna Leililani Thielen, Andrea Merli, Gianluca Zunica, Abdul-Kerim Guseinov, Roberto Ribatti, Louis André Marie Jean Henry, Spencer Edward Collaviti, Julius Christian Daniel Schulte

The first observation of the Σ^{+}→pμ^{+}μ^{-} decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 5.4 fb^{-1}, collected with the LHCb detector at a center-of-mass energy of 13 TeV. A y ...

American Physical Society (APS)2025

Observation of D →a0 (980)π in the decays D0 →π+π-η and D+ →π+π0η

Yunxuan Song

We report the first amplitude analyses of the decays D0→π+π-η and D+→π+π0η using a data sample taken with the BESIII detector at the center-of-mass energy of 3773 MeV, corresponding to an integrated luminosity of 7.9 fb-1. The contribution from the process ...

2024

Observation of Charmonium Hc Radiative Decays to Multiple Light Hadrons and the Tensor State F2 (1270)

Yunxuan Song

Using psi(3686)->pi(0)h(c) decays from a data sample of (27.12 +/- 0.14)x10(8) psi(3686) events collected by the BESIII detector at the BEPCII collider, h(c) radiative decays to multiple light hadrons below 2.8 GeV/c(2)-gamma pi(+)pi(-), gamma pi(+)pi(-)et ...

AMER PHYSICAL SOC2025

First observation of the decay Λc+ → nKS0π+π0

Yunxuan Song

Based on 4.5 fb(-1) of ethorne- collision data accumulated at center-of-mass energies between 4599.53 and 4698.82 MeV with the BESIII detector, the decay Lambda(+)(c) -> nK(S)(0)pi(+)pi(0) is observed for the first time with a significance of 9.2 sigma. Th ...

American Physical Society2024

STCF conceptual design report (Volume 1): Physics & detector

Yunxuan Song

The super tau-charm facility (STCF) is an electron-positron collider proposed by the Chinese particle physics community. It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5 x 1035 cm-2 center dot s-1 or ...

2024

Search for the $ {B}_c^{+} $ → χc1(3872)π+ decay

Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Sebastian Schulte, Marie Theres Christin Bachmayer, Ettore Zaffaroni, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Yunxuan Song, Vitalii Lisovskyi, Sonia Amina Bouchiba, Federico Ronchetti, Radoslav Marchevski, Anni Matilda Kauniskangas, Dimitrios Kaminaris, Raphaël van Laak, Pierre Paul Louis Mayencourt, Andrea Merli, Gianluca Zunica, Abdul-Kerim Guseinov, Roberto Ribatti, Spencer Edward Collaviti

A search for the decay

{B}_c^{+}

→ χ c1(3872)π + is reported using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb −1. ...

Springer2025

Observation of ψ(3686) → $ {\Xi}^{-}{K}_S^0{\overline{\varOmega}}^{+} $ + c.c

Yunxuan Song

Using a sample of (2.712 ± 0.014) × 109 ψ(3686) events collected with the BESIII detector at the electron positron collider BEPCII, the decay ψ(3686) →

{\Xi}^{-}{K}_S^0{\overline{\varOmega}}^{+}

+ c.c. is observed for the first time, which has a signif ...

Springer Science and Business Media LLC2025

Amplitude analysis of the decays D0 → π+π-π+π- and D0 → π+π-π0π0

Yunxuan Song

Using e(+)e(-) annihilation data corresponding to an integrated luminosity of 2.93 fb(-1) taken at the center-of-mass energy root s = 3.773 GeV with the BESIII detector, a joint amplitude analysis is performed on the decays D-0 -> pi(+)pi(-)pi(+)pi(-) and ...

IOP Publishing Ltd2024