Charm Physics at the Super $\tau$-Charm Factory

Abstract

The high-luminosity Super $\tau$-Charm Factory (STCF) will be a crucial facility for charm-physics research, particularly for the precise measurement of electroweak parameters, measuring $D^0$-${\bar{D}}^0$ mixing parameters, investigating Charge-Parity (CP) violation within the charm sector, searching for the rare and forbidden decays of charmed hadrons, and addressing other foundational questions related to charmed hadrons. With the world's largest charm-threshold data, the STCF aims to achieve high sensitivity in studying the strong phase of neutral $D$ mesons using quantum correlation, complementing studies at LHCb and Belle II, and contributing to the understanding of CP violations globally. The STCF will also enable world-leading precision in measuring the leptonic decays of charmed mesons and baryons, providing constraints on the Cabibbo-Kobayashi-Maskawa matrix and strong-force dynamics. Additionally, the STCF will explore charmed hadron spectroscopy. The advanced detector and clean experimental environment of the STCF will enable unprecedented precision, help address key challenges in the Standard Model, and facilitate the search for potential new physics.

This version is published in Chinese Physics Letters 42, 010201 (2025), which is updated from the White Paper on STCF charm physics contributing to the Snowmass 2021. 14 pages, 5 table

References in corpus (21)

• Observation of $CP$ violation in charm decays
• Branching ratios and direct CP asymmetries in $D\to PP$ decays
• Relating D0-anti-D0 Mixing and D0 -> l+l- with New Physics
• ${\Lambda }_c\to \Lambda {\ell }^{+}{\nu }_{\ell }$ form factors and decay rates from lattice QCD with physical quark masses
• On $SU(3{)}_F$ Breaking through Final State Interactions and CP Asymmetries in $D\to PP$ Decays
• Heavy-to-light semileptonic decays of Lambda_b and Lambda_c baryons in the covariant confined quark model
• Discerning new physics in charm meson leptonic and semileptonic decays
• Semileptonic decays of ${\Lambda }_c$ baryons in the relativistic quark model
• $CP$ asymmetries in charm decays into neutral kaons
• Study of the Semileptonic Decay ${\Lambda }_c^{+}\to \Lambda e^{+}{\nu }_e$
• D-meson semileptonic decays to pseudoscalars from four-flavor lattice QCD
• A fast simulation package for STCF detector
• Search for the decay $D^0\to {\pi }^0\nu \bar{\nu }$
• Study of Electromagnetic Decays of Orbitally Excited ${\Xi }_c$ Baryons
• Axial-Vector Emitting Weak Nonleptonic Deacys of ${\Omega }_c^0$ Baryon
• Partial wave analysis of the charmed baryon hadronic decay ${\Lambda }_c^{+}\to \Lambda {\pi }^{+}{\pi }^0$
• First Observation of the Semileptonic Decay ${\Lambda }_c^{+}\to p{K}^{-}{e}^{+}{\nu }_e$
• Observation of a rare beta decay of the charmed baryon with a Graph Neural Network
• Updated measurement of the branching fraction of $D_s^{+}\to {\tau }^{+}{\nu }_{\tau }$ via ${\tau }^{+}\to {\pi }^{+}{\bar{\nu }}_{\tau }$
• Improved measurement of the branching fraction of $D_s^{+}\to {\mu }^{+}{\nu }_{\mu }$
• Measurement of the branching fraction of $D_s^{+}\to {\tau }^{+}{\nu }_{\tau }$ via ${\tau }^{+}\to {\mu }^{+}{\nu }_{\mu }\overline{{\nu }_{\tau }}$

Cited by in corpus (7)

• Roles of the $N(1535)$ and $a_0(980)$ in the process ${\Lambda }_c^{+}\to {\pi }^{+}\eta n$
• Large CP violation in charmed baryon decays
• First Measurement of the Decay Dynamics in the Semileptonic Transition of the $D^{+(0)}$ into the Axial-vector Meson ${\bar{K}}_1(1270)$
• Exclusive semileptonic decays of $D$ and $D_s$ mesons into orbitally and radially excited states of strange and light mesons
• Prospects for $P$ and $CP$ violation in ${\Lambda }_c^{+}$ decays with polarized beam at Super Tau-Charm Facility
• Search for the low-lying excited baryon ${\Sigma }^{\ast }(1/2^{-})$ through process ${\Lambda }_c^{+}\to \Lambda K^0{\pi }^{+}$
• Exclusive semileptonic and nonleptonic $J/\psi$ decays