Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production Mechanisms
LHC run-II has a great potential to search for new resonances in the diphoton channel. Latest 13 TeV data already put stringent limits on the cross sections in the diphoton channel assuming the resonance is produced through the gluon-gluon fusion. Many beyond the Standard Model (SM) theories predict...
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Wiley
2018-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/9150617 |
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| author | Tanumoy Mandal |
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| collection | DOAJ |
| description | LHC run-II has a great potential to search for new resonances in the diphoton channel. Latest 13 TeV data already put stringent limits on the cross sections in the diphoton channel assuming the resonance is produced through the gluon-gluon fusion. Many beyond the Standard Model (SM) theories predict TeV-scale scalars, which copiously decay to diphotons. Apart from the gluon-gluon fusion production, these scalars can also be dominantly produced in other ways too at the LHC, namely, through the quark-quark fusion or the gauge boson fusions like the photon-photon, photon-Z, WW, or ZZ fusions. In this paper we use an effective field theory approach where a heavy scalar can be produced in various ways and recast the latest ATLAS diphoton resonance search to put model-independent limits on its mass and effective couplings to the SM particles. If a new scalar is discovered at the LHC, it would be very important to identify its production mechanism in order to probe the nature of the underlying theory. We show that combining various kinematic variables in a multivariate analysis can be very powerful to distinguish different production mechanisms from one another. |
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| id | doaj-art-feda11345d9d455081080f618d19a355 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | Advances in High Energy Physics |
| spelling | doaj-art-feda11345d9d455081080f618d19a3552025-02-03T06:07:22ZengWileyAdvances in High Energy Physics1687-73571687-73652018-01-01201810.1155/2018/91506179150617Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production MechanismsTanumoy Mandal0Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, SwedenLHC run-II has a great potential to search for new resonances in the diphoton channel. Latest 13 TeV data already put stringent limits on the cross sections in the diphoton channel assuming the resonance is produced through the gluon-gluon fusion. Many beyond the Standard Model (SM) theories predict TeV-scale scalars, which copiously decay to diphotons. Apart from the gluon-gluon fusion production, these scalars can also be dominantly produced in other ways too at the LHC, namely, through the quark-quark fusion or the gauge boson fusions like the photon-photon, photon-Z, WW, or ZZ fusions. In this paper we use an effective field theory approach where a heavy scalar can be produced in various ways and recast the latest ATLAS diphoton resonance search to put model-independent limits on its mass and effective couplings to the SM particles. If a new scalar is discovered at the LHC, it would be very important to identify its production mechanism in order to probe the nature of the underlying theory. We show that combining various kinematic variables in a multivariate analysis can be very powerful to distinguish different production mechanisms from one another.http://dx.doi.org/10.1155/2018/9150617 |
| spellingShingle | Tanumoy Mandal Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production Mechanisms Advances in High Energy Physics |
| title | Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production Mechanisms |
| title_full | Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production Mechanisms |
| title_fullStr | Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production Mechanisms |
| title_full_unstemmed | Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production Mechanisms |
| title_short | Exclusion Limits on a Scalar Decaying to Photons and Distinguishing Its Production Mechanisms |
| title_sort | exclusion limits on a scalar decaying to photons and distinguishing its production mechanisms |
| url | http://dx.doi.org/10.1155/2018/9150617 |
| work_keys_str_mv | AT tanumoymandal exclusionlimitsonascalardecayingtophotonsanddistinguishingitsproductionmechanisms |