Impact factor of Chinese Physics C is 3.6 in 2023 Impact factor of Chinese Physics C is 3.6 in 2022 2021 Impact Factor 2.944
Advanced Search
×
近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。
本刊再次郑重声明：
（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137
（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。
（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。
                  
《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2018, Vol. 42> Issue(2) : 023104 DOI: 10.1088/1674-1137/42/2/023104

Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity

  • 1.

     Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • Recently, experimental collaborations have reported O(10) upper limits on the signal strength of four-top production at the LHC. Surprisingly, we find that the constraining power of four-top production on the qqtt type of operators is already competitive with the measurements of top-pair production, even though the precision level of the latter is more than two orders of magnitude better. This is explained by the enhanced sensitivity of the four-top cross section to qqtt operators, due to multiple insertion of operators in the squared amplitude, and to the large threshold energy of four-top production. We point out that even though the dominant contribution beyond the standard model comes from the O(C44/Λ8) terms, the effective field theory expansion remains valid for a wide range of underlying theories. Considering the possible improvements of this measurement with higher integrated luminosity, we believe that this process will become even more crucial for probing and testing the standard model deviations in the top-quark sector, and will eventually provide valuable information about the top-quark properties, leading to significant improvements in precision top physics.
      PCAS:
  • 加载中

  • References

    [1] C. Patrignani et al (Particle Data Group), Chin. Phys. C, 40(10):100001 (2016)
    [2] G. Bevilacqua and M. Worek, JHEP, 1207:111 (2012)
    [3] J. Alwall et al, JHEP, 1407:079 (2014)
    [4] M. Czakon, P. Fiedler, and A. Mitov, Phys. Rev. Lett., 110:252004 (2013)
    [5] M. Czakon and A. Mitov, Comput. Phys. Commun., 185:2930 (2014)
    [6] B. Lillie, J. Shu, and T. M. P. Tait, JHEP, 0804:087 (2008)
    [7] A. Pomarol and J. Serra, Phys. Rev. D, 78:074026 (2008)
    [8] K. Kumar, T. M. P. Tait, and R. Vega-Morales, JHEP, 0905:022 (2009)
    [9] G. Cacciapaglia, R. Chierici, A. Deandrea et al, JHEP, 1110:042 (2011)
    [10] M. Perelstein and A. Spray, JHEP, 1109:008 (2011)
    [11] J. A. Aguilar-Saavedra, and J. Santiago, Phys. Rev. D, 85:034021 (2012)
    [12] L. Beck, F. Blekman, D. Dobur et al, Phys. Lett. B, 746:48 (2015)
    [13] P. S. Bhupal Dev and A. Pilaftsis, JHEP, 1412:024 (2014) Erratum:[JHEP, 1511:147 (2015)]
    [14] B. S. Acharya, P. Grajek, G. L. Kane et al, arXiv:0901.3367[hep-ph].
    [15] T. Gregoire, E. Katz, and V. Sanz, Phys. Rev. D, 85:055024 (2012)
    [16] C. Degrande, J. M. Gerard, C. Grojean et al, JHEP, 1103:125 (2011)
    [17] Q. H. Cao, S. L. Chen, and Y. Liu, Phys. Rev. D, 95(5):053004 (2017)
    [18] S. Weinberg, Phys. Rev. Lett., 43:1566 (1979)
    [19] C. N. Leung, S. T. Love, and S. Rao, Z. Phys. C, 31:433 (1986)
    [20] W. Buchmuller and D. Wyler, Nucl. Phys. B, 268:621 (1986)
    [21] A. Buckley, C. Englert, J. Ferrando et al, Phys. Rev. D, 92(9):091501 (2015)
    [22] A. Buckley, C. Englert, J. Ferrando et al, JHEP, 1604:015 (2016)
    [23] The ATLAS Collaboration, ATLAS-CONF-2012-130
    [24] CMS Collaboration CMS-PAS-TOP-13-012
    [25] G. Aad et al (ATLAS Collaboration), JHEP, 1508:105 (2015)
    [26] The ATLAS collaboration, ATLAS-CONF-2016-013
    [27] The ATLAS collaboration ATLAS-CONF-2016-020
    [28] The ATLAS collaboration (ATLAS Collaboration), ATLAS-CONF-2016-104
    [29] A. M. Sirunyan et al (CMS Collaboration), Phys. Lett. B, 772:336 (2017)
    [30] A. M. Sirunyan et al (CMS Collaboration), arXiv:1704.07323[hep-ex]
    [31] M. Aaboud et al (ATLAS Collaboration), arXiv:1704.08493[hep-ex]
    [32] E. Alvarez, D. A. Faroughy, J. F. Kamenik et al, Nucl. Phys. B, 915:19 (2017)
    [33] C. Zhang and S. Willenbrock, Phys. Rev. D, 83:034006 (2011)
    [34] J. de Blas, M. Chala, and J. Santiago, JHEP, 1509:189 (2015)
    [35] R. D. Ball et al (NNPDF Collaboration), JHEP, 1504:040 (2015)
    [36] C. Degrande, C. Duhr, B. Fuks et al, Comput. Phys. Commun., 183:1201 (2012)
    [37] A. Alloul, N. D. Christensen, C. Degrande et al, Comput. Phys. Commun., 185:2250 (2014)
    [38] O. Bessidskaia Bylund, F. Maltoni, I. Tsinikos et al, JHEP, 1605:052 (2016)
    [39] C. Degrande, G. Durieux, F. Maltoni et al, in preparation
    [40] G. Servant, doi:10.3204/DESY-PROC-2010-01/251
    [41] B. Grzadkowski, M. Iskrzynski, M. Misiak et al, JHEP, 1010:085 (2010)
    [42] CMS Collaboration CMS-PAS-TOP-14-016
    [43] F. Krauss, S. Kuttimalai, and T. Plehn, Phys. Rev. D, 95(3):035024 (2017)
    [44] T. Appelquist and J. Carazzone, Phys. Rev. D, 11:2856 (1975).
    [45] A. Biekotter, A. Knochel, M. Kramer et al, Phys. Rev. D, 91:055029 (2015)
    [46] R. Contino, A. Falkowski, F. Goertz et al, JHEP, 1607:144 (2016)
    [47] A. Butter, O. J. P. Eboli, J. Gonzalez-Fraile et al, JHEP, 1607:152 (2016)
    [48] A. Falkowski, M. Gonzalez-Alonso, A. Greljo et al, JHEP, 1702:115 (2017)
    [49] A. Pomarol, Higgs Physics, in Proceedings of the 2014 European School of High-Energy Physics (ESHEP 2014):edited by M. Mulders, G. Zanderigh, p.59
    [50] C. Degrande, N. Greiner, W. Kilian et al, Annals Phys., 335:21 (2013)
    [51] A. Kobach, Phys. Lett. B, 758:455 (2016)
    [52] G. Aad et al (ATLAS Collaboration), Eur. Phys. J. C, 74(10):3109 (2014) Addendum:[Eur. Phys. J. C, 76:no. 11:642 (2016)]
    [53] A. M. Sirunyan et al (CMS Collaboration), arXiv:1701.06228[hep-ex]
    [54] M. P. Rosello and M. Vos, Eur. Phys. J. C, 76(4):200 (2016)
    [55] L. A. Harland-Lang, A. D. Martin, P. Motylinski et al, Eur. Phys. J. C, 75(5):204 (2015)
    [56] S. Dulat et al, Phys. Rev. D, 93(3):033006 (2016)
    [57] T. A. Aaltonen et al (CDF and D0 Collaborations), Phys. Rev. D, 89(7):072001 (2014)
    [58] M. Aaboud et al (ATLAS Collaboration), Phys. Lett. B, 761:136 (2016)
    [59] M. Czakon, P. Fiedler, and A. Mitov, Phys. Rev. Lett., 115(5):052001 (2015)
    [60] (CDF and D0 Collaborations), FERMILAB-CONF-16-386-PPD, CDF-NOTE-11206, D0-NOTE-6492.
    [61] W. Bernreuther and Z. G. Si, Phys. Rev. D, 86:034026 (2012)
    [62] G. Aad et al (ATLAS Collaboration), Eur. Phys. J. C, 76(2):87 (2016)
    [63] V. Khachatryan et al (CMS Collaboration), Phys. Rev. D, 93(3):034014 (2016)
    [64] T. Sjostrand, P. Eden, C. Friberg et al, Comput. Phys. Commun., 135:238 (2001)
    [65] M. Aaboud et al (ATLAS Collaboration), Phys. Rev. D, 94(9):092003 (2016)

  • Access

    加载中

Get Citation
Cen Zhang. Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity[J]. Chinese Physics C, 2018, 42(2): 023104. doi: 10.1088/1674-1137/42/2/023104
Cen Zhang. Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity[J]. Chinese Physics C, 2018, 42(2): 023104.  doi: 10.1088/1674-1137/42/2/023104 shu
Milestone
Received: 2017-08-22
Fund

    Supported by the 100-talent project of Chinese Academy of Sciences

Article Metric

Article Views(1643)
PDF Downloads(24)
Cited by(0)
Policy on re-use
To reuse of Open Access content published by CPC, for content published under the terms of the Creative Commons Attribution 3.0 license (“CC CY”), the users don’t need to request permission to copy, distribute and display the final published version of the article and to create derivative works, subject to appropriate attribution.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity

    Corresponding author: Cen Zhang,
  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • Received Date: 2017-08-22
  • Available Online: 2018-02-05
Fund Project:  Supported by the 100-talent project of Chinese Academy of Sciences

Abstract: Recently, experimental collaborations have reported O(10) upper limits on the signal strength of four-top production at the LHC. Surprisingly, we find that the constraining power of four-top production on the qqtt type of operators is already competitive with the measurements of top-pair production, even though the precision level of the latter is more than two orders of magnitude better. This is explained by the enhanced sensitivity of the four-top cross section to qqtt operators, due to multiple insertion of operators in the squared amplitude, and to the large threshold energy of four-top production. We point out that even though the dominant contribution beyond the standard model comes from the O(C44/Λ8) terms, the effective field theory expansion remains valid for a wide range of underlying theories. Considering the possible improvements of this measurement with higher integrated luminosity, we believe that this process will become even more crucial for probing and testing the standard model deviations in the top-quark sector, and will eventually provide valuable information about the top-quark properties, leading to significant improvements in precision top physics.

    HTML

Reference (65)

目录

Link
IOPScience
SCOAP3
arXiv
Chinese Physical Society
Journal information
Introduction
Editorial Board
Others
Subscribe
Contact us
QQ: 1307685413
Tel: +86-010-88235947
Fax: +86-010-88233126
E-mail: cpc@ihep.ac.cn

  • CPC Website

  • IOP Website

  • CPC WeChat

Copyright © Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China 京ICP备05002789号-1

Supported by: Beijing Renhe Information Technology Co. Ltd  E-mail: info@rhhz.net

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return