The Matrix Element Method at next-to-leading order QCD for hadronic collisions: single top-quark production at the LHC as an example application

被引：16

作者：

Martini, Till ^{[1
]}

Uwer, Peter ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 05期

关键词：

NLO Computations; QCD Phenomenology; JET CROSS-SECTIONS; LIKELIHOOD METHOD; MISSING MOMENTUM; EVENTS; MASS; RECONSTRUCTION;

D O I：

10.1007/JHEP05(2018)141

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Recently, a general algorithm to extend the Matrix Element Method (MEM) by taking into account next-to-leading-order (NLO) corrections in quantum chromodynamics (QCD) has been presented. In this article, the algorithm is applied to the most general case that coloured partons are encountered in the initial as well as the final state. This represents a substantial extension compared to previous work. As a concrete example, the production of single top quarks at the LHC is studied. We present in detail the generation of unweighted events following the NLO predictions. By treating these events as the result of a toy experiment, we show the first proof-of-principle application of the Matrix Element Method at NLO QCD for hadronic jet production. As an illustration, we study the determination of the top-quark mass. We find that apart from elevating the powerful MEM to a sound theoretical foundation at NLO the inclusion of the NLO corrections can lead to sizeable effects compared to the Matrix Element Method relying on leading-order predictions only. Furthermore, we find that the incorporation of the NLO corrections is mandatory to obtain reliable estimates of the theoretical uncertainties. In addition, this work shows that measuring the top-quark mass using the MEM in single top-quark production offers an interesting alternative to mass measurements in top-quark pair production.

引用

页数：67

共 61 条

[1]

Aaboud M, 2016, EUR PHYS J C, V76, DOI 10.1140/epjc/s10052-016-4466-1

[2] Evidence for single top-quark production in the s-channel in proton-proton collisions at √s=8 TeV with the ATLAS detector using the Matrix Element Method [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Abdinov, O. ;

Aben, R. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Abreu, R. ;

Abulaiti, Y. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Adelman, J. ;

Adomeit, S. ;

Adye, T. ;

Affolder, A. A. ;

Agatonovic-Jovin, T. ;

Agricola, J. ;

Aguilar-Saavedra, J. A. ;

Ahlen, S. P. ;

Ahmadov, F. ;

Aielli, G. ;

Akerstedt, H. ;

Akesson, T. P. A. ;

Akimov, A. V. ;

Alberghi, G. L. ;

Albert, J. ;

Albrand, S. ;

Alconada Verzini, M. J. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alexa, C. ;

Alexander, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Alimonti, G. ;

Alio, L. ;

Alison, J. ;

Alkire, S. P. ;

Allbrooke, B. M. M. ;

Allport, P. P. ;

Aloisio, A. ;

Alonso, A. ;

Alonso, F. ;

Alpigiani, C. ;

Altheimer, A. ;

Gonzalez, B. Alvarez ;

Alvarez Piqueras, D. .

PHYSICS LETTERS B, 2016, 756 :228-246

[3] A precision measurement of the mass of the top quark [J].

Abazov, VM ;

Abbott, B ;

Abdesselam, A ;

Abolins, M ;

Abramov, V ;

Acharya, BS ;

Adams, DL ;

Adams, M ;

Ahmed, SN ;

Alexeev, GD ;

Alton, A ;

Alves, GA ;

Arnoud, Y ;

Avila, C ;

Babintsev, VV ;

Babukhadia, L ;

Bacon, TC ;

Baden, A ;

Baffioni, S ;

Baldin, B ;

Balm, PW ;

Banerjee, S ;

Barberis, E ;

Baringer, P ;

Barreto, J ;

Bartlett, JF ;

Bassler, U ;

Bauer, D ;

Bean, A ;

Beaudette, F ;

Begel, M ;

Belyaev, A ;

Beri, SB ;

Bernardi, G ;

Bertram, I ;

Besson, A ;

Beuselinck, R ;

Bezzubov, VA ;

Bhat, PC ;

Bhatnagar, V ;

Bhattacharjee, M ;

Blazey, G ;

Blekman, F ;

Blessing, S ;

Boehnlein, A ;

Bojko, NI ;

Bolton, TA ;

Borcherding, F ;

Bos, K ;

Bose, T .

NATURE, 2004, 429 (6992) :638-642

[4]

Abbott B, 1999, PHYS REV D, V60, DOI 10.1103/PhysRevD.60.012001

[5] Top quark mass measurement from dilepton events at CDF II with the matrix-element method [J].

Abulencia, A. ;

Acosta, D. ;

Adelman, J. ;

Affolder, T. ;

Akimoto, T. ;

Albrow, M. G. ;

Ambrose, D. ;

Amerio, S. ;

Amidei, D. ;

Anastassov, A. ;

Anikeev, K. ;

Annovi, A. ;

Antos, J. ;

Aoki, M. ;

Apollinari, G. ;

Arguin, J. -F. ;

Arisawa, T. ;

Artikov, A. ;

Ashmanskas, W. ;

Attal, A. ;

Azfar, F. ;

Azzi-Bacchetta, P. ;

Azzurri, P. ;

Bacchetta, N. ;

Bachacou, H. ;

Badgett, W. ;

Barbaro-Galtieri, A. ;

Barnes, V. E. ;

Barnett, B. A. ;

Baroiant, S. ;

Bartsch, V. ;

Bauer, G. ;

Bedeschi, F. ;

Behari, S. ;

Belforte, S. ;

Bellettini, G. ;

Bellinger, J. ;

Belloni, A. ;

Ben Haim, E. ;

Benjamin, D. ;

Beretvas, A. ;

Beringer, J. ;

Berry, T. ;

Bhatti, A. ;

Binkley, M. ;

Bisello, D. ;

Blair, R. E. ;

Blocker, C. ;

Blumenfeld, B. ;

Bocci, A. .

PHYSICAL REVIEW D, 2006, 74 (03)

[6] The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations [J].

Alwall, J. ;

Frederix, R. ;

Frixione, S. ;

Hirschi, V. ;

Maltoni, F. ;

Mattelaer, O. ;

Shao, H. -S. ;

Stelzer, T. ;

Torrielli, P. ;

Zaro, M. .

JOURNAL OF HIGH ENERGY PHYSICS, 2014, (07)

[7] Matrix element method and QCD radiation [J].

Alwall, J. ;

Freitas, A. ;

Mattelaer, O. .

PHYSICAL REVIEW D, 2011, 83 (07)

[8] Extracting precise Higgs couplings by using the matrix element method [J].

Andersen, Jeppe R. ;

Englert, Christoph ;

Spannowsky, Michael .

PHYSICAL REVIEW D, 2013, 87 (01)

[9] Constraining anomalous HVV interactions at proton and lepton colliders [J].

Anderson, Ian ;

Bolognesi, Sara ;

Caola, Fabrizio ;

Gao, Yanyan ;

Gritsan, Andrei V. ;

Martin, Christopher B. ;

Melnikov, Kirill ;

Schulze, Markus ;

Tran, Nhan V. ;

Whitbeck, Andrew ;

Zhou, Yaofu .

PHYSICAL REVIEW D, 2014, 89 (03)

[10]

[Anonymous], ARXIV171010699

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