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Search for the lightest scalar top quark in events with two leptons in pp¯ collisions at s=1.96 TeV

ابحث عن أخف كوارك علوي رقمي في الأحداث مع اثنين من اللبتونات في الاصطدامات عند s=1.96 TeV
Authors: V. M. Abazov; B. Abbott; M. Abolins; B. S. Acharya; Mark Raymond Adams; T. Adams; E. Aguilo; +93 Authors

Search for the lightest scalar top quark in events with two leptons in pp¯ collisions at s=1.96 TeV

Abstract

Nous rapportons les résultats d'une recherche de la production par paire du partenaire supersymétrique le plus léger du quark top, t∼1, en utilisant un ensemble de données correspondant à une luminosité intégrée de 1 fb−1 collectée par le détecteur DØ à une énergie de centre de masse pp¯ de 1,96 TeV au collisionneur Fermilab Tevatron. On suppose que les deux quarks supérieurs scalaires se désintègrent en un quark b, un lepton chargé et un neutrino scalaire. La recherche est effectuée dans les états finaux électron plus muon et diélectron. La topologie du signal se compose de deux leptons isolés, d'une énergie transversale manquante et de jets. Nous ne trouvons aucune preuve de ce processus et excluons les régions de l'espace des paramètres dans le cadre du modèle standard supersymétrique minimal.

Informamos los resultados de una búsqueda de la producción de pares del compañero supersimétrico más ligero del quark top, t∼1, utilizando un conjunto de datos correspondiente a una luminosidad integrada de 1 fb−1 recopilada por el detector DØ a una energía del centro de masa pp¯ de 1.96 TeV en el colisionador Fermilab Tevatron. Se supone que ambos quarks escalares top se descomponen en un quark b, un leptón cargado y un neutrino escalar. La búsqueda se realiza en los estados finales electrón más muón y dielectrón. La topología de la señal consiste en dos leptones aislados, falta energía transversal y chorros. No encontramos evidencia de este proceso y excluimos regiones de espacio de parámetros en el marco del modelo estándar supersimétrico mínimo.

We report results of a search for the pair production of the lightest supersymmetric partner of the top quark, t˜1, using a data set corresponding to an integrated luminosity of 1 fb−1 collected by the DØ detector at a pp¯ center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider. Both scalar top quarks are assumed to decay into a b quark, a charged lepton and a scalar neutrino. The search is performed in the electron plus muon and dielectron final states. The signal topology consists of two isolated leptons, missing transverse energy, and jets. We find no evidence for this process and exclude regions of parameter space in the framework of the minimal supersymmetric standard model.

نقوم بالإبلاغ عن نتائج البحث عن إنتاج الزوج من أخف شريك فائق التناظر للكوارك العلوي، t 1، باستخدام مجموعة بيانات تتوافق مع اللمعان المتكامل لـ 1 fb-1 الذي تم جمعه بواسطة كاشف DØ عند طاقة pp¯ مركز الكتلة 1.96 TeV في مصادم Fermilab Tevatron. يُفترض أن كلا الكواركين العلويين العدديين يتحللان إلى كوارك بي وليبتون مشحون ونيوترينو عددي. يتم إجراء البحث في الحالات النهائية للإلكترون بالإضافة إلى الميون والعازل. تتكون طوبولوجيا الإشارة من اثنين من اللبتونات المعزولة، والطاقة المستعرضة المفقودة، والنفاثات. لا نجد أي دليل على هذه العملية ونستبعد مناطق مساحة المعلمة في إطار النموذج القياسي الفائق الحد الأدنى.

Keywords

Nuclear and High Energy Physics, Physics, Muon, Missing energy, Particle physics, Nuclear physics, Geometry, Neutrino Detection, Top quark, Electron, Lepton, Particle Dark Matter and Detection Methods, Tevatron, Physics and Astronomy, Large Hadron Collider, Physical Sciences, Neutrino, Quark, FOS: Mathematics, Neutrino Flavor Transformation and Detection, Particle Physics and High-Energy Collider Experiments, Scalar (mathematics), Mathematics

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Average
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