Theoretical and experimental status of rare charm decays

Abstract

Rare charm decays offer the unique possibility to explore flavour-changing neutral-currents in the up-sector within the Standard Model and beyond. Due to the lack of effective methods to reliably describe its low energy dynamics, rare charm decays have been considered as less promising for long. However, this lack does not exclude the possibility to perform promising searches for New Physics per se, but a different philosophy of work is required. Exact or approximate symmetries of the Standard Model allow to construct clean null-test observables, yielding an excellent road to the discovery of New Physics, complementing the existing studies in the down-sector. In this review, we summarize the theoretical and experimental status of rare charm $|\Delta c|=|\Delta u|=1$ transitions, as well as opportunities for current and future experiments such as LHCb, Belle II, BES III, the FCC-ee and proposed tau-charm factories. We also use the most recent experimental results to report updated limits on lepton-flavour conserving and lepton-flavour violating Wilson coefficients.

arXiv comment35 pages, 6 charming figures, 10 tables

References in corpus (101)

• A Large Mass Hierarchy from a Small Extra Dimension
• Weak Decays Beyond Leading Logarithms
• The BABAR Detector
• Design and Construction of the BESIII Detector
• LHCb Detector Performance
• The Littlest Higgs
• FLAG Review 2019
• Unparticle Physics
• The Belle II Physics Book
• Phenomenology of the Little Higgs Model
• Weak Radiative B-Meson Decay Beyond Leading Logarithms
• Effective Hamiltonian for $B \ra X_s e^+ e^-$ Beyond Leading Logarithms in the NDR and HV Schemes
• More Model-Independent Analysis of b->s Processes
• On the Standard Model predictions for $R_K$ and $R_{K^{\ast }}$
• Photonic penguins at two loops and m_t-dependence of BR[ B -> X_s l^+ l^-]
• Weak form factors for heavy meson decays: an update
• Model independent constraints on leptoquarks from rare processes
• Another Odd Thing About Unparticle Physics
• Angular Distributions of B -> K ll Decays
• Observation of $CP$ violation in charm decays
• 2HDMs predictions for $B\to X_s\gamma$ in NLO QCD
• Effective Hamiltonian for Non-Leptonic |Delta F| = 1 Decays at NNLO in QCD
• Rare Charm Decays in the Standard Model and Beyond
• Electromagnetic Logarithms in B -> X_s l+ l-
• Review of Lepton Universality tests in B decays
• Anomalous Dimension Matrix for Radiative and Rare Semileptonic B Decays up to Three Loops
• The Radiative Decays B -> V gamma at Next-to-Leading Order in QCD
• Theory of B -> K(*)l+l- decays at high q^2: OPE and quark-hadron duality
• CP Asymmetries in bar B -> bar K* (-> bar K pi) l+ l- and Untagged bar B_s,B_s -> phi (-> K+ K-) l+ l- Decays at NLO
• Decay constants and form factors of s-wave and p-wave mesons in the covariant light-front quark model
• Building and testing models with extended Higgs sectors
• Leptoquark Flavor Patterns & B Decay Anomalies
• Introducing the Little Higgs
• General Analysis of B -> K^(*) l^+ l^- Decays at Low Recoil
• |Delta F| = 1 Nonleptonic Effective Hamiltonian in a Simpler Scheme
• $B_{(s)},D_{(s)}\to \pi ,K,\eta ,\rho ,K^{\ast },\omega ,\varphi$ Transition Form Factors and Decay Rates with Extraction of the CKM parameters $|V_{ub}|$, $|V_{cs}|$, $|V_{cd}|$
• Prospects of discovering new physics in rare charm decays
• Calculation of Long-Distance Effects in Exclusive Weak Radiative Decays of B-Mesons
• Flavor & new physics opportunities with rare charm decays into leptons
• Three-Loop Mixing of Dipole Operators
• Four-Loop Anomalous Dimensions for Radiative Flavour-Changing Decays
• Radiative Weak Decays of Charm Mesons
• Revisiting CP violation in $D\to PP$ and $VP$ decays
• Some Phenomenologies of Unparticle Physics
• The $c\to u\gamma$ Contribution to Weak Radiative Charm Decay
• ${\Lambda }_c\to N$ form factors from lattice QCD and phenomenology of ${\Lambda }_c\to n{\ell }^{+}{\nu }_{\ell }$ and ${\Lambda }_c\to p{\mu }^{+}{\mu }^{-}$ decays
• Direct CP asymmetry in $D\to {\pi }^{-}{\pi }^{+}$ and $D\to K^{-}{K}^{+}$ in QCD-based approach
• Searches for Rare or Forbidden Semileptonic Charm Decays
• On $D\to X_u{l}^{+}{l}^{-}$ within the Standard Model and Frameworks like the Littlest Higgs Model with T Parity
• On $SU(3{)}_F$ Breaking through Final State Interactions and CP Asymmetries in $D\to PP$ Decays
• Effects of Littlest Higgs model in rare D meson decays
• Standard Model prediction and new physics tests for D0 -> h+h-l+l- (h=π,K; l=e,μ)
• Exclusive Chromomagnetism in heavy-to-light FCNCs
• $\Delta A_{CP}$ within the Standard Model and beyond
• Shedding light on CP violation in the charm system via D to V gamma decays
• Updated constraints on new physics in rare charm decays
• Rare charm meson decays D->Pl^+l^- and c->ul^+l^- in SM and MSSM
• The New Physics Reach of Null Tests with $D\to \pi \ell \ell$ and $D_s\to K\ell \ell$ Decays
• Search for the rare decay $D^0\to {\mu }^{+}{\mu }^{-}$
• Charming CP Violation and Dipole Operators from RS Flavor Anarchy
• Implications of the LHCb discovery of CP violation in charm decays
• $c\to u\gamma$ in the minimal supersymmetric standard model
• Null tests from angular distributions in $D\to P_1{P}_2{l}^{+}{l}^{-}$, $l=e,\mu$ decays on and off peak
• Search for leptonic decays of D0 mesons
• Rare radiative charm decays within the standard model and beyond
• Study of $D^{+}\to K^{-}{\pi }^{+}{e}^{+}{\nu }_e$
• Exploiting CP-asymmetries in rare charm decays
• Constraining the Unitarity Triangle with B -> V gamma
• Search for the lepton-flavour violating decay $D^0\to e^{\pm }{\mu }^{\mp }$
• Resonance catalyzed CP asymmetries in D -> P l+ l-
• First Measurement of the Form Factors in the Decays D0 to rho- e+ nu_e and D+ to rho0 e+ nu_e
• The Radiative Leptonic Decays D^0 -> e^+ e^- gamma, mu^+ mu^- gamma in the Standard Model and Beyond
• Measurement of the D*(2010)+ meson width and the D*(2010)+ - D0 mass difference
• On CP Asymmetries in Two-, Three- and Four-Body D Decays
• Observation of $D^0$ meson decays to ${\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ and $K^{+}{K}^{-}{\mu }^{+}{\mu }^{-}$ final states
• Search for Rare and Forbidden Dilepton Decays of the D+, Ds, and D0 Charmed Mesons
• Leptoquarks in FCNC charm decays
• Search for Rare and Forbidden Charm Meson Decays D0--> V l+ l- and h h l l
• Long distance $c\to u\gamma$ effects in weak radiative decays of D-mesons
• Observation of $D^0\to {\rho }^0\gamma$ and search for $CP$ violation in radiative charm decays
• Search for the rare decay ${\Lambda }_c^{+}\to p{\mu }^{+}{\mu }^{-}$
• $D\to \rho {\ell }^{+}{\ell }^{-}$ Decays in the QCD Factorization Approach
• Higher-order Wilson coefficients for c $\to$ u transitions in the Standard Model
• Manifestations of Warped Extra Dimension in Rare Charm Decays and Asymmetries
• Search for the rare decays $D\to h(h^{\prime })e^{+}{e}^{-}$
• Measurement of angular and CP asymmetries in $D^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ and $D^0\to K^{+}{K}^{-}{\mu }^{+}{\mu }^{-}$ decays
• Measurement of the Branching Fractions of the Radiative Charm Decays $D^0\to {\bar{K}}^{\ast 0}\gamma$ and $D^0\to \varphi \gamma$
• First observation of the decay $D^0\to K^{-}{\pi }^{+}{\mu }^{+}{\mu }^{-}$ in the ${\rho }^0$-$\omega$ region of the dimuon mass spectrum
• New Physics effects in charm meson decays involving $c\to u{l}^{+}{l}^{-}(l_i^{\mp }{l}_j^{\pm })$ transitions
• Search for D0 to p e- and D0 to pbar e+
• Decays $D_{(s)}^{+}\to \pi (K{)}^{+}{\ell }^{+}{\ell }^{-}$ and $D^0\to {\ell }^{+}{\ell }^{-}$ in the MSSM with and without R-parity
• Observation of the decay $D^0\to K^{-}{\pi }^{+}{e}^{+}{e}^{-}$
• Testing the standard model with $D_{(s)}\to K_1(\to K\pi \pi )\gamma$ decays
• Search for heavy Majorana neutrino in lepton number violating decays of D-> K pi e+ e+
• The photon polarization in radiative $D$ decays, phenomenologically
• Search for baryon and lepton number violating decays $D^{+}\to \bar{\Lambda }({\bar{\Sigma }}^0)e^{+}$ and $D^{+}\to \Lambda ({\Sigma }^0)e^{+}$
• Search for lepton-flavor violating decays $D^0\to X^0{e}^{\pm }{\mu }^{\mp }$
• Looking for New Physics via Semi-leptonic and Leptonic rare decays of $D$ and $D_s$
• Search for rare or forbidden decays of the $D^0$ meson
• The radiative decay $D^0\to {\bar{K}}^{\ast 0}\gamma$ with vector meson dominance
• Searching for New physics in Charm Radiative decays

Cited by in corpus (19)

• Charged Lepton Flavor Violation at the EIC
• From B-meson anomalies to Kaon physics with scalar leptoquarks
• Two is better than one: The U-spin-CP anomaly in charm
• Angular analysis of $D^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ and $D^0\to K^{+}{K}^{-}{\mu }^{+}{\mu }^{-}$ decays and search for $CP$ violation
• Pinning down $|\Delta c|=|\Delta u|=1$ couplings with rare charm baryon decays
• Effective field theory analysis of rare $|\Delta c|=|\Delta u|=1$ charm decays
• Impact of $b\to s\ell \ell$ anomalies on rare charm decays in non-universal $Z^{\prime }$ models
• $S$-wave contribution to rare $D^0\to {\pi }^{+}{\pi }^{-}{\ell }^{+}{\ell }^{-}$ decays in the Standard Model and sensitivity to New Physics
• Recent advances in charm mixing and $CP$ violation at LHCb
• Search for the rare decay of charmed baryon ${\Lambda }_c^{+}$ into $p{\mu }^{+}{\mu }^{-}$ final state
• Search for $D^0$ meson decays to ${\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ and $K^{+}{K}^{-}{e}^{+}{e}^{-}$ final states
• Search for resonance-enhanced $CP$ and angular asymmetries in the ${\Lambda }_c^{+}\to p{\mu }^{+}{\mu }^{-}$ decay at LHCb
• Measurement of $D^0-{\overline{D}}^0$ mixing and search for $CP$ violation with $D^0\to K^{+}{\pi }^{-}$ decays
• Weak radiative decay ${\Lambda }_c^{+}\to {\Sigma }^{+}\gamma$ using light-cone sum rules
• Prospects for discovering new physics in charm sector through low-energy scattering processes $e^{-}p\to e^{-}({\mu }^{-}){\Lambda }_c$
• Searching and identifying leptoquarks through low-energy polarized scattering processes $e^{-}p\to e^{-}{\Lambda }_c$
• Search for the Rare Decays $D_s^{+}\to h^{+}(h^0)e^{+}{e}^{-}$
• New opportunities for rare charm from $Z\to c\bar{c}$ decays
• The Deconstruction of Flavor in the Privately Democratic Higgs Sector