Zγ production at NNLO including anomalous couplings
Abstract In this paper we present a next-to-next-to-leading order (NNLO) QCD calculation of the processes pp → l + l −γ and pp→νν¯γ $$ pp\to \nu \overline{\nu}\gamma $$ that we have implemented in MCFM. Our calculation includes QCD corrections at NNLO both for the Standard Model (SM) and additionall...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2017-11-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP11(2017)150 |
| _version_ | 1818007812838522880 |
|---|---|
| author | John M. Campbell Tobias Neumann Ciaran Williams |
| author_facet | John M. Campbell Tobias Neumann Ciaran Williams |
| author_sort | John M. Campbell |
| collection | DOAJ |
| description | Abstract In this paper we present a next-to-next-to-leading order (NNLO) QCD calculation of the processes pp → l + l −γ and pp→νν¯γ $$ pp\to \nu \overline{\nu}\gamma $$ that we have implemented in MCFM. Our calculation includes QCD corrections at NNLO both for the Standard Model (SM) and additionally in the presence of Zγγ and ZZγ anomalous couplings. We compare our implementation, obtained using the jettiness slicing approach, with a previous SM calculation and find broad agreement. Focusing on the sensitivity of our results to the slicing parameter, we show that using our setup we are able to compute NNLO cross sections with numerical uncertainties of about 0.1%, which is small compared to residual scale uncertainties of a few percent. We study potential improvements using two different jettiness definitions and the inclusion of power corrections. At s=13 $$ \sqrt{s}=13 $$ TeV we present phenomenological results and consider Zγ as a background to H → Zγ production. We find that, with typical cuts, the inclusion of NNLO corrections represents a small effect and loosens the extraction of limits on anomalous couplings by about 10%. |
| first_indexed | 2024-04-14T05:20:40Z |
| format | Article |
| id | doaj.art-a664c953485a4b669cad75080b17e119 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-14T05:20:40Z |
| publishDate | 2017-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-a664c953485a4b669cad75080b17e1192022-12-22T02:10:11ZengSpringerOpenJournal of High Energy Physics1029-84792017-11-0120171113010.1007/JHEP11(2017)150Zγ production at NNLO including anomalous couplingsJohn M. Campbell0Tobias Neumann1Ciaran Williams2FermilabDepartment of Physics, University at Buffalo, The State University of New YorkDepartment of Physics, University at Buffalo, The State University of New YorkAbstract In this paper we present a next-to-next-to-leading order (NNLO) QCD calculation of the processes pp → l + l −γ and pp→νν¯γ $$ pp\to \nu \overline{\nu}\gamma $$ that we have implemented in MCFM. Our calculation includes QCD corrections at NNLO both for the Standard Model (SM) and additionally in the presence of Zγγ and ZZγ anomalous couplings. We compare our implementation, obtained using the jettiness slicing approach, with a previous SM calculation and find broad agreement. Focusing on the sensitivity of our results to the slicing parameter, we show that using our setup we are able to compute NNLO cross sections with numerical uncertainties of about 0.1%, which is small compared to residual scale uncertainties of a few percent. We study potential improvements using two different jettiness definitions and the inclusion of power corrections. At s=13 $$ \sqrt{s}=13 $$ TeV we present phenomenological results and consider Zγ as a background to H → Zγ production. We find that, with typical cuts, the inclusion of NNLO corrections represents a small effect and loosens the extraction of limits on anomalous couplings by about 10%.http://link.springer.com/article/10.1007/JHEP11(2017)150QCD Phenomenology |
| spellingShingle | John M. Campbell Tobias Neumann Ciaran Williams Zγ production at NNLO including anomalous couplings Journal of High Energy Physics QCD Phenomenology |
| title | Zγ production at NNLO including anomalous couplings |
| title_full | Zγ production at NNLO including anomalous couplings |
| title_fullStr | Zγ production at NNLO including anomalous couplings |
| title_full_unstemmed | Zγ production at NNLO including anomalous couplings |
| title_short | Zγ production at NNLO including anomalous couplings |
| title_sort | zγ production at nnlo including anomalous couplings |
| topic | QCD Phenomenology |
| url | http://link.springer.com/article/10.1007/JHEP11(2017)150 |
| work_keys_str_mv | AT johnmcampbell zgproductionatnnloincludinganomalouscouplings AT tobiasneumann zgproductionatnnloincludinganomalouscouplings AT ciaranwilliams zgproductionatnnloincludinganomalouscouplings |