Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV
We search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] integrated luminosity of pp̅ collision data at √s=1.96 TeV in the lepton+jets decay channel, where one top quark decays leptonically and the other hadronically. A matrix-element reconstruction technique is used; for each even...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society (APS)
2012
|
| Online Access: | http://hdl.handle.net/1721.1/69199 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1826209116734881792 |
|---|---|
| author | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Makhoul, Khaldoun |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Makhoul, Khaldoun |
| author_sort | Gomez-Ceballos, Guillelmo |
| collection | MIT |
| description | We search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] integrated luminosity of pp̅ collision data at √s=1.96 TeV in the lepton+jets decay channel, where one top quark decays leptonically and the other hadronically. A matrix-element reconstruction technique is used; for each event a probability density function of the tt̅ candidate invariant mass is sampled. These probability density functions are used to construct a likelihood function, whereby the cross section for resonant tt̅ production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of tt̅ pairs. A benchmark model of leptophobic Z′→tt̅ is excluded with m[subscript Z]′<900 GeV/c[superscript 2] at 95% confidence level. |
| first_indexed | 2024-09-23T14:17:50Z |
| format | Article |
| id | mit-1721.1/69199 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:17:50Z |
| publishDate | 2012 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/691992023-02-26T05:51:03Z Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV Search for resonant production of tt̅ pairs in 4.8 fb-1 of integrated luminosity of pp̅ collisions at √s=1.96 TeV Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Makhoul, Khaldoun Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Gomez-Ceballos, Guillelmo Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, K. Paus, Christoph M. E. We search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] integrated luminosity of pp̅ collision data at √s=1.96 TeV in the lepton+jets decay channel, where one top quark decays leptonically and the other hadronically. A matrix-element reconstruction technique is used; for each event a probability density function of the tt̅ candidate invariant mass is sampled. These probability density functions are used to construct a likelihood function, whereby the cross section for resonant tt̅ production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of tt̅ pairs. A benchmark model of leptophobic Z′→tt̅ is excluded with m[subscript Z]′<900 GeV/c[superscript 2] at 95% confidence level. National Science Foundation (U.S.) United States. Dept. of Energy Alfred P. Sloan Foundation 2012-02-24T18:48:11Z 2012-02-24T18:48:11Z 2011-10 2011-07 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1089-4918 http://hdl.handle.net/1721.1/69199 Aaltonen, T. et al. “Search for Resonant Production of Tt[over ¯] Pairs in 4.8 Fb^{-1} of Integrated Luminosity of Pp[over ¯] Collisions at Sqrt[s]=1.96 TeV.” Physical Review D 84.7 (2011): n. pag. Web. 24 Feb. 2012. © 2011 American Physical Society https://orcid.org/0000-0002-6047-4211 en_US http://dx.doi.org/10.1103/PhysRevD.84.072004 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Makhoul, Khaldoun Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV |
| title | Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV |
| title_full | Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV |
| title_fullStr | Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV |
| title_full_unstemmed | Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV |
| title_short | Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV |
| title_sort | search for resonant production of tt pairs in 4 8 fb superscript 1 of integrated luminosity of pp collisions at √s 1 96 tev |
| url | http://hdl.handle.net/1721.1/69199 https://orcid.org/0000-0002-6047-4211 |
| work_keys_str_mv | AT gomezceballosguillelmo searchforresonantproductionofttpairsin48fbsuperscript1ofintegratedluminosityofppcollisionsats196tev AT goncharovmaxim searchforresonantproductionofttpairsin48fbsuperscript1ofintegratedluminosityofppcollisionsats196tev AT pauschristophme searchforresonantproductionofttpairsin48fbsuperscript1ofintegratedluminosityofppcollisionsats196tev AT makhoulkhaldoun searchforresonantproductionofttpairsin48fbsuperscript1ofintegratedluminosityofppcollisionsats196tev AT gomezceballosguillelmo searchforresonantproductionofttpairsin48fb1ofintegratedluminosityofppcollisionsats196tev AT goncharovmaxim searchforresonantproductionofttpairsin48fb1ofintegratedluminosityofppcollisionsats196tev AT pauschristophme searchforresonantproductionofttpairsin48fb1ofintegratedluminosityofppcollisionsats196tev AT makhoulkhaldoun searchforresonantproductionofttpairsin48fb1ofintegratedluminosityofppcollisionsats196tev |