- Main
Measurement of the top quark mass in the tt¯→dilepton channel from √s=8 TeV ATLAS data
- Author(s): Aaboud, M;
- Aad, G;
- Abbott, B;
- Abdallah, J;
- Abdinov, O;
- Abeloos, B;
- Aben, R;
- AbouZeid, OS;
- Abraham, NL;
- Abramowicz, H;
- Abreu, H;
- Abreu, R;
- Abulaiti, Y;
- Acharya, BS;
- Adamczyk, L;
- Adams, DL;
- Adelman, J;
- Adomeit, S;
- Adye, T;
- Affolder, AA;
- Agatonovic-Jovin, T;
- Agricola, J;
- Aguilar-Saavedra, JA;
- Ahlen, SP;
- Ahmadov, F;
- Aielli, G;
- Akerstedt, H;
- Åkesson, TPA;
- Akimov, AV;
- Alberghi, GL;
- Albert, J;
- Albrand, S;
- Alconada Verzini, MJ;
- Aleksa, M;
- Aleksandrov, IN;
- Alexa, C;
- Alexander, G;
- Alexopoulos, T;
- Alhroob, M;
- Ali, B;
- Aliev, M;
- Alimonti, G;
- Alison, J;
- Alkire, SP;
- Allbrooke, BMM;
- Allen, BW;
- Allport, PP;
- Aloisio, A;
- Alonso, A;
- Alonso, F;
- Alpigiani, C;
- Alstaty, M;
- Alvarez Gonzalez, B;
- Álvarez Piqueras, D;
- Alviggi, MG;
- Amadio, BT;
- Amako, K;
- Amaral Coutinho, Y;
- Amelung, C;
- Amidei, D;
- Amor Dos Santos, SP;
- Amorim, A;
- Amoroso, S;
- Amundsen, G;
- Anastopoulos, C;
- Ancu, LS;
- Andari, N;
- Andeen, T;
- Anders, CF;
- Anders, G;
- Anders, JK;
- Anderson, KJ;
- Andreazza, A;
- Andrei, V;
- Angelidakis, S;
- Angelozzi, I;
- Anger, P;
- Angerami, A;
- Anghinolfi, F;
- Anisenkov, AV;
- Anjos, N;
- Annovi, A;
- Antel, C;
- Antonelli, M;
- Antonov, A;
- Anulli, F;
- Aoki, M;
- Aperio Bella, L;
- Arabidze, G;
- Arai, Y;
- Araque, JP;
- Arce, ATH;
- Arduh, FA;
- Arguin, JF;
- Argyropoulos, S;
- Arik, M;
- Armbruster, AJ;
- Armitage, LJ;
- Arnaez, O;
- Arnold, H
- et al.
Abstract
The top quark mass is measured in the tt¯→dilepton channel (lepton=e,μ) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s=8 TeV and correspond to an integrated luminosity of about 20.2 fb−1. Exploiting the template method, and using the distribution of invariant masses of lepton–b-jet pairs, the top quark mass is measured to be mtop=172.99±0.41 (stat)±0.74 (syst) GeV, with a total uncertainty of 0.84 GeV. Finally, a combination with previous ATLAS mtop measurements from s=7 TeV data in the tt¯→dilepton and tt¯→lepton+jets channels results in mtop=172.84±0.34 (stat)±0.61 (syst) GeV, with a total uncertainty of 0.70 GeV.
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