Subleading power corrections for event shape variables in $e^+ e^-$ annihilation
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866910441152708608 |
|---|---|
| author | Buonocore, Luca Grazzini, Massimiliano Guadagni, Flavio Rottoli, Luca |
| author_facet | Buonocore, Luca Grazzini, Massimiliano Guadagni, Flavio Rottoli, Luca |
| contents | We consider subleading power corrections to event shape variables in $e^+e^-$ collisions at the first order in the QCD coupling $α_s$. We start from the jettiness variable $τ_2$ and the $y_{23}$ resolution variable for the $k_T$ jet clustering algorithm and we analytically compute the corresponding cumulative cross section. We investigate the origin of the different power suppressed contributions in the two-jet limit and trace it back to their different coverage of the phase space. We extend our analysis to the case of thrust and of the $C$-parameter, and we finally discuss a class of observables that depend on a continuous parameter giving different weight to central and forward emissions and we evaluate the corresponding subleading power corrections. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_12768 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Subleading power corrections for event shape variables in $e^+ e^-$ annihilation Buonocore, Luca Grazzini, Massimiliano Guadagni, Flavio Rottoli, Luca High Energy Physics - Phenomenology We consider subleading power corrections to event shape variables in $e^+e^-$ collisions at the first order in the QCD coupling $α_s$. We start from the jettiness variable $τ_2$ and the $y_{23}$ resolution variable for the $k_T$ jet clustering algorithm and we analytically compute the corresponding cumulative cross section. We investigate the origin of the different power suppressed contributions in the two-jet limit and trace it back to their different coverage of the phase space. We extend our analysis to the case of thrust and of the $C$-parameter, and we finally discuss a class of observables that depend on a continuous parameter giving different weight to central and forward emissions and we evaluate the corresponding subleading power corrections. |
| title | Subleading power corrections for event shape variables in $e^+ e^-$ annihilation |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2311.12768 |