$${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channels
Abstract We consider QCD radiative corrections to the associated production of a heavy-quark pair ( $$Q{{\bar{Q}}}$$ Q Q ¯ ) with a generic colourless system F at hadron colliders. We discuss the resummation formalism for the production of the $$Q{{\bar{Q}}}F$$ Q Q ¯ F system at small values of its...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-06-01
|
| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-09247-w |
| _version_ | 1818899892750254080 |
|---|---|
| author | Stefano Catani Ignacio Fabre Massimiliano Grazzini Stefan Kallweit |
| author_facet | Stefano Catani Ignacio Fabre Massimiliano Grazzini Stefan Kallweit |
| author_sort | Stefano Catani |
| collection | DOAJ |
| description | Abstract We consider QCD radiative corrections to the associated production of a heavy-quark pair ( $$Q{{\bar{Q}}}$$ Q Q ¯ ) with a generic colourless system F at hadron colliders. We discuss the resummation formalism for the production of the $$Q{{\bar{Q}}}F$$ Q Q ¯ F system at small values of its total transverse momentum $$q_T$$ q T . We present the results of the corresponding resummation coefficients at next-to-leading and, partly, next-to-next-to-leading order. The perturbative expansion of the resummation formula leads to the explicit ingredients that can be used to apply the $$q_T$$ q T subtraction formalism to fixed-order calculations for this class of processes. We use the $$q_T$$ q T subtraction formalism to perform a fully differential perturbative computation for the production of a top-antitop quark pair and a Higgs boson. At next-to-leading order we compare our results with those obtained with established subtraction methods and we find complete agreement. We present, for the first time, the results for the flavour off-diagonal partonic channels at the next-to-next-to-leading order. |
| first_indexed | 2024-12-19T19:55:11Z |
| format | Article |
| id | doaj.art-8ef517ebb02945f4b38d5cf6a9bf5981 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-19T19:55:11Z |
| publishDate | 2021-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-8ef517ebb02945f4b38d5cf6a9bf59812022-12-21T20:07:50ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522021-06-0181611310.1140/epjc/s10052-021-09247-w$${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channelsStefano Catani0Ignacio Fabre1Massimiliano Grazzini2Stefan Kallweit3INFN, Sezione di FirenzePhysik Institut, Universität ZürichPhysik Institut, Universität ZürichDipartimento di Fisica, Università degli Studi di Milano-BicoccaAbstract We consider QCD radiative corrections to the associated production of a heavy-quark pair ( $$Q{{\bar{Q}}}$$ Q Q ¯ ) with a generic colourless system F at hadron colliders. We discuss the resummation formalism for the production of the $$Q{{\bar{Q}}}F$$ Q Q ¯ F system at small values of its total transverse momentum $$q_T$$ q T . We present the results of the corresponding resummation coefficients at next-to-leading and, partly, next-to-next-to-leading order. The perturbative expansion of the resummation formula leads to the explicit ingredients that can be used to apply the $$q_T$$ q T subtraction formalism to fixed-order calculations for this class of processes. We use the $$q_T$$ q T subtraction formalism to perform a fully differential perturbative computation for the production of a top-antitop quark pair and a Higgs boson. At next-to-leading order we compare our results with those obtained with established subtraction methods and we find complete agreement. We present, for the first time, the results for the flavour off-diagonal partonic channels at the next-to-next-to-leading order.https://doi.org/10.1140/epjc/s10052-021-09247-w |
| spellingShingle | Stefano Catani Ignacio Fabre Massimiliano Grazzini Stefan Kallweit $${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channels European Physical Journal C: Particles and Fields |
| title | $${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channels |
| title_full | $${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channels |
| title_fullStr | $${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channels |
| title_full_unstemmed | $${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channels |
| title_short | $${t {{\bar{t}}}H}$$ t t ¯ H production at NNLO: the flavour off-diagonal channels |
| title_sort | t bar t h t t ¯ h production at nnlo the flavour off diagonal channels |
| url | https://doi.org/10.1140/epjc/s10052-021-09247-w |
| work_keys_str_mv | AT stefanocatani tbarthtthproductionatnnlotheflavouroffdiagonalchannels AT ignaciofabre tbarthtthproductionatnnlotheflavouroffdiagonalchannels AT massimilianograzzini tbarthtthproductionatnnlotheflavouroffdiagonalchannels AT stefankallweit tbarthtthproductionatnnlotheflavouroffdiagonalchannels |