Precise determination of 
                
                  
                
                $$\alpha _{S}(M_Z)$$
                
                  
                    
                      
                        α
                        S
                      
                      
                        (
                        
                          M
                          Z
                        
                        )

Kardos, Ádám; Kluth, S.; Somogyi, G.; Tulipánt, Zoltán; Verbytskyi, A.

doi:10.1140/epjc/s10052-018-5963-1

Cited by 37 publications

(30 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of (±)-6, in which chelate formation can be excluded, experimental evidence showed that the CM reaction of the N-allyl C=C bond is disfavored because of the twocarbon-atom distance. This is in sharp contrast to our earlier findings, where hydrogen bonding preferred the transformation of the C=C bond closer to the NH group (T1, three C-atom distance from the ring nitrogen atom) [57] (Figure 2). In the present case, steric factors are most probably responsible for the selectivity of the CM reaction: the N-allylic system is sterically disfavored in view of the metallacyclobutane formation (T3) and, accordingly, the CM reaction takes place at the less hindered olefinic bond furnishing (±)-7 selectively ( Figure 2).…”

Section: Resultscontrasting

confidence: 99%

“…In continuation, we wanted to investigate the behavior of cyclic -amino esters with the aim of extending our earlier findings on CM reactions of dialkenylated cyclic -amino esters through chemodiscrimination (Scheme 5). [57] We have found earlier that stereochemical factors (chelate ring stability), as well as partial H-bonding interactions between the amide or carbamate functions (NHR) at various distances relative to the olefin bond, are responsible for the selectivity detected in the CM reaction. Consequently, we decided to further investigate the effects of these factors in the case of two cyclopentane -amino esters.…”

Section: Resultsmentioning

confidence: 99%

“…Our aim was to expand our earlier findings on the chemoselective transformation of various C-C double bonds of diolefinated cyclic -amino esters [57] by evaluation of the chemical behavior under cross-metathesis reactions (CM) of varied dialkenylated -lactams, derived from 1,3-and 1,5-cyclooctadiene regioisomers, in the context of C-C double bond chemodiscrimination.…”

Section: Resultsmentioning

confidence: 99%

“…Chemodifferentiation of the olefinic bonds of some divinylated substituted cyclopentanes in CM reactions was observed to be viable under carefully selected reaction conditions. [57] In this context, we evaluated the behavior in cross-metathesis of some diolefinated lactams with olefinic bonds located at different C-atom distances from the N-and O-atom of the azetidine ring. Experiments were carried out in the presence of commercially available catalysts, namely, Grubbs 1 st generation (G-1), Grubbs 2 nd generation (G-2), Hoveyda-Grubbs 1 st generation (HG-1), and Hoveyda-Grubbs 2 nd generation catalysts (HG-2) ( Figure 1).…”

Section: Resultsmentioning

confidence: 99%

“…Transformation of divinylated N-monoprotected cyclopentane -amino esters (±)-16 and (±)-19 in CM. [57] CM mono-coupled products in 4:1 ratio (Scheme 5). [57] This selectivity is probably due to the involvement of the intramolecular H-bonding directing effect.…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Chemodiscrimination of Olefin Bonds Through Cross‐Metathesis Reactions – Synthesis of Functionalized β‐Lactam and β‐Amino Acid Derivatives

et al. 2019

View full text Add to dashboard Cite

Chemodifferentiation of C=C bonds of various diolefinated β‐lactams or β‐amino esters has been investigated through cross‐metathesis reactions. The transformations involved substrate‐dependent cross‐metathesis of dialkenylated azetidinones, derived from the ring opening of constrained unsaturated bicyclic β‐lactam isomers. Cross‐metathesis reactions have been carried out under various conditions and catalysts in view of chemodiscrimination affording functionalized β‐lactams or β‐amino acid derivatives.

show abstract

Section: Resultscontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Chemodiscrimination of Olefin Bonds Through Cross‐Metathesis Reactions – Synthesis of Functionalized β‐Lactam and β‐Amino Acid Derivatives

et al. 2019

View full text Add to dashboard Cite

show abstract

QCD factorization from light-ray OPE

Chen

2024

J. High Energ. Phys.

View full text Add to dashboard Cite

The energy-energy correlator (EEC) in Quantum Chromodynamics (QCD) serves as an important event shape for probing the substructure of jets in high-energy collisions. A significant progress has been made in understanding the collinear limit, where the angle between two detectors approaches zero, from the factorization formula in QCD and the light-ray Operator Product Expansion (OPE) in Conformal Field Theory. Building upon prior research on the renormalization of light-ray operators, we take an innovative step to extend the light-ray OPE into non-conformal contexts, with a specific emphasis on perturbative QCD. Our proposed form of the light-ray OPE is constrained by three fundamental properties: Lorentz symmetry, renormalization group invariance, and constraints from physical observables. This extension allows us to derive a factorization formula for the collinear limit of EEC, facilitating the future exploration and understanding on subleading power corrections in collinear limit.

show abstract

Probing transverse momentum dependent structures with azimuthal dependence of energy correlators

Kang,

Lee,

Shao

et al. 2024

J. High Energ. Phys.

View full text Add to dashboard Cite

We study the azimuthal angle dependence of the energy-energy correlators $$\langle \mathcal{E}\left({\widehat{n}}_{1}\right)\mathcal{E}\left({\widehat{n}}_{2}\right)\rangle $$ in the back-to-back region for e+e− annihilation and deep inelastic scattering (DIS) processes with general polarization of the proton beam. We demonstrate that the polarization information of the beam and the underlying partons from the hard scattering is propagated into the azimuthal angle dependence of the energy-energy correlators. In the process, we define the Collins-type EEC jet functions and introduce a new EEC observable using the lab-frame angles in the DIS process. Furthermore, we extend our formalism to explore the two-point energy correlation between hadrons with different quantum numbers $${\mathbb{S}}_{i}$$ in the back-to-back limit $$\langle {\mathcal{E}}_{{\mathbb{S}}_{1}}\left({\widehat{n}}_{1}\right){\mathcal{E}}_{{\mathbb{S}}_{2}}\left({\widehat{n}}_{2}\right)\rangle $$. We find that in the Operator Product Expansion (OPE) region the nonperturbative information is entirely encapsulated by a single number. Using our formalism, we present several phenomenological studies that showcase how energy correlators can be used to probe transverse momentum dependent structures.

show abstract

Precise determination of $$\alpha _{S}(M_Z)$$ α S ( M Z )

Cited by 37 publications

References 63 publications

Chemodiscrimination of Olefin Bonds Through Cross‐Metathesis Reactions – Synthesis of Functionalized β‐Lactam and β‐Amino Acid Derivatives

Chemodiscrimination of Olefin Bonds Through Cross‐Metathesis Reactions – Synthesis of Functionalized β‐Lactam and β‐Amino Acid Derivatives

QCD factorization from light-ray OPE

Probing transverse momentum dependent structures with azimuthal dependence of energy correlators

Contact Info

Product

Resources

About