Report
Subleading power corrections for event shape variables in $e^+ e^-$ annihilation
| العنوان: | Subleading power corrections for event shape variables in $e^+ e^-$ annihilation |
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| المؤلفون: | Buonocore, Luca, Grazzini, Massimiliano, Guadagni, Flavio, Rottoli, Luca |
| سنة النشر: | 2023 |
| المجموعة: | High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology |
| الوصف: | We consider subleading power corrections to event shape variables in $e^+e^-$ collisions at the first order in the QCD coupling $\alpha_s$. We start from the jettiness variable $\tau_2$ 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. Comment: 16 pages, 4 figures. Minor modifications and updated references. Version published in EPJC |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjc/s10052-024-12788-5 |
| URL الوصول: | http://arxiv.org/abs/2311.12768 |
| رقم الانضمام: | edsarx.2311.12768 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjc/s10052-024-12788-5 |
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