| A search for t(t)over-bar resonances using lepton-plus-jets events in proton-proton collisions at root s=8 tev with the atlas detector | |
| Aad, G.57,121; Abbott, B.153; Abdallah, J.214; Abdinov, O.14; Aben, R.146,147; Abolins, M.; AbouZeid, O. S.222; Abramowicz, H.216; Abreu, H.215; Abreu, R.45 | |
| 刊名 | Journal of high energy physics
 |
| 2015-08-28 | |
| 期号 | 8页码:54 |
| 关键词 | Exotics Hadron-hadron scattering Top physics |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/jhep08(2015)148 |
| 通讯作者 | Aad, g.() |
| 英文摘要 | A search for new particles that decay into top quark pairs is reported. the search is performed with the atlas experiment at the lhc using an integrated luminosity of 20.3 fb(-1) of proton-proton collision data collected at a centre-of-mass energy of root s = 8tev. the lepton-plus-jets final state is used, where the top pair decays to w (+) bw(-)(b) over bar, with one w boson decaying leptonically and the other hadronically. the invariant mass spectrum of top quark pairs is examined for local excesses or deficits that are inconsistent with the standard model predictions. no evidence for a top quark pair resonance is found, and 95% confidence-level limits on the production rate are determined for massive states in benchmark models. the upper limits on the cross-section times branching ratio of a narrow z' boson decaying to top pairs range from 4.2 pb to 0.03 pb for resonance masses from 0.4 tev to 3.0 tev. a narrow leptophobic topcolour z' boson with mass below 1.8 tev is excluded. upper limits are set on the cross-section times branching ratio for a broad colour-octet resonance with gamma/m = 15% decaying to tt. these range from 4.8 pb to 0.03 pb for masses from 0.4 tev to 3.0 tev. a kaluza-klein excitation of the gluon in a randall-sundrum model is excluded for masses below 2.2 tev. |
| WOS关键词 | PRODUCTION CROSS-SECTION ; QUARK PAIR PRODUCTION ; COMPOSITE HIGGS ; PARTON DISTRIBUTIONS ; VACUUM MISALIGNMENT ; HADRON COLLIDERS ; PP COLLISIONS ; LHC ; RESUMMATION ; ALGORITHM |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000363532500006 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2176490 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Aad, G. |
| 作者单位 | 1.Univ Adelaide, Dept Phys, Adelaide, SA, Australia 2.SUNY Albany, Dept Phys, Albany, NY 12222 USA 3.Univ Alberta, Dept Phys, Edmonton, AB, Canada 4.Ankara Univ, Dept Phys, TR-06100 Ankara, Turkey 5.Istanbul Aydin Univ, Istanbul, Turkey 6.TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey 7.CNRS, IN2P3, LAPP, Annecy Le Vieux, France 8.Univ Savoie Mt Blanc, Annecy Le Vieux, France 9.Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA 10.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA |
| 推荐引用方式 GB/T 7714 | Aad, G.,Abbott, B.,Abdallah, J.,et al. A search for t(t)over-bar resonances using lepton-plus-jets events in proton-proton collisions at root s=8 tev with the atlas detector[J]. Journal of high energy physics,2015(8):54. |
| APA | Aad, G..,Abbott, B..,Abdallah, J..,Abdinov, O..,Aben, R..,...&Hays, C. P..(2015).A search for t(t)over-bar resonances using lepton-plus-jets events in proton-proton collisions at root s=8 tev with the atlas detector.Journal of high energy physics(8),54. |
| MLA | Aad, G.,et al."A search for t(t)over-bar resonances using lepton-plus-jets events in proton-proton collisions at root s=8 tev with the atlas detector".Journal of high energy physics .8(2015):54. |
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