Improved measurement of ttZ couplings at the CERN LHC

被引：33
作者：
Baur, U [1 ]
Juste, A
Orr, LH
Rainwater, D
机构：
[1] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA
[2] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[3] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA
来源：
PHYSICAL REVIEW D | 2006年 / 73卷 / 03期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevD.73.034016
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We consider QCD t (t) over barZ production at the LHC with Z ->nu(nu) over bar and all-hadronic t (t) over bar decays, i.e. pp -> p(T)b (b) over bar +4 jets, as a tool to measure ttZ couplings. This channel has a significantly larger cross section than those where the Z boson decays leptonically. However, t (t) over bar, b (b) over bar +4 jet, t (t) over barj, and t (t) over bar jj production give rise to potentially large backgrounds. We show that these processes can be suppressed to an acceptable level with suitable cuts, and find that adding the p(T)b (b) over bar +4 jet channel to the final states used in previous ttZ couplings analyses will improve the sensitivity by 10%-60%. We also discuss how the measurement of the ttZ couplings may constrain Little Higgs models.
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页数：10
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共 60 条
  • [1] OBSERVATION OF THE TOP-QUARK
    ABACHI, S
    ABBOTT, B
    ABOLINS, M
    ACHARYA, BS
    ADAM, I
    ADAMS, DL
    ADAMS, M
    AHN, S
    AIHARA, H
    ALITTI, J
    ALVAREZ, G
    ALVES, GA
    AMIDI, E
    AMOS, N
    ANDERSON, EW
    ARONSON, SH
    ASTUR, R
    AVERY, RE
    BADEN, A
    BALAMURALI, V
    BALDERSTON, J
    BALDIN, B
    BANTLY, J
    BARTLETT, JF
    BAZIZI, K
    BENDICH, J
    BERI, SB
    BERTRAM, I
    BEZZUBOV, VA
    BHAT, PC
    BHATNAGAR, V
    BHATTACHARJEE, M
    BISCHOFF, A
    BISWAS, N
    BLAZEY, G
    BLESSING, S
    BOEHNLEIN, A
    BOJKO, NI
    BORCHERDING, F
    BORDERS, J
    BOSWELL, C
    BRANDT, A
    BROCK, R
    BROSS, A
    BUCHHOLZ, D
    BURTOVOI, VS
    BUTLER, JM
    CASEY, D
    CASTILLAVALDEZ, H
    CHAKRABORTY, D
    [J]. PHYSICAL REVIEW LETTERS, 1995, 74 (14) : 2632 - 2637
  • [2] Helicity of the W boson in lepton plus jets t(t)over-bar events
    Abazov, V
    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, KF
    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
    [J]. PHYSICS LETTERS B, 2005, 617 (1-2) : 1 - 10
  • [3] Search for right-handed W bosons in top quark decay -: art. no. 011104
    Abazov, VM
    Abbott, B
    Abolins, M
    Acharya, BS
    Adams, M
    Adams, T
    Agelou, M
    Agram, JL
    Ahn, SH
    Ahsan, M
    Alexeev, GD
    Alkhazov, G
    Alton, A
    Alverson, G
    Alves, GA
    Anastasoaie, M
    Andeen, T
    Anderson, S
    Andrieu, B
    Arnoud, Y
    Askew, A
    Åsman, B
    Jesus, ACSA
    Atramentov, O
    Autermann, C
    Avila, C
    Badaud, F
    Baden, A
    Baldin, B
    Balm, PW
    Banerjee, S
    Barberis, E
    Bargassa, P
    Baringer, P
    Barnes, C
    Barreto, J
    Bartlett, JF
    Bassler, U
    Bauer, D
    Bean, A
    Beauceron, S
    Begel, M
    Bellavance, A
    Beri, SB
    Bernardi, G
    Bernhard, R
    Bertram, I
    Besançon, M
    Beuselinck, R
    Bezzubov, VA
    [J]. PHYSICAL REVIEW D, 2005, 72 (01): : 1 - 8
  • [4] A precision measurement of the mass of the top quark
    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
    [J]. NATURE, 2004, 429 (6992) : 638 - 642
  • [5] NEARBY DOORWAY STATES, PARITY DOUBLETS, AND PARITY MIXING IN COMPOUND NUCLEAR-STATES
    AUERBACH, N
    BOWMAN, JD
    SPEVAK, V
    [J]. PHYSICAL REVIEW LETTERS, 1995, 74 (14) : 2638 - 2641
  • [6] ABE T, 2001, UNPUB P APS DPF DPB
  • [7] Measurement of the W boson polarization in top decay at CDF at √s=1.8 TeV -: art. no. 031101
    Acosta, D
    Affolder, T
    Albrow, MG
    Ambrose, D
    Amidei, D
    Anikeev, K
    Antos, J
    Apollinari, G
    Arisawa, T
    Artikov, A
    Ashmanskas, W
    Azfar, F
    Azzi-Bacchetta, P
    Bacchetta, N
    Bachacou, H
    Badgett, W
    Barbaro-Galtieri, A
    Barnes, VE
    Barnett, BA
    Baroiant, S
    Barone, M
    Bauer, G
    Bedeschi, F
    Behari, S
    Belforte, S
    Bell, WH
    Bellettini, G
    Bellinger, J
    Benjamin, D
    Beretvas, A
    Bhatti, A
    Binkley, M
    Bisello, D
    Bishai, M
    Blair, RE
    Blocker, C
    Bloom, K
    Blumenfeld, B
    Bocci, A
    Bodek, A
    Bolla, G
    Bolshov, A
    Bortoletto, D
    Boudreau, J
    Bromberg, C
    Brubaker, E
    Budagov, J
    Budd, HS
    Burkett, K
    Busetto, G
    [J]. PHYSICAL REVIEW D, 2005, 71 (03): : 031101 - 1
  • [8] AGUILARSAAVEDRA JA, HEPPH0106315
  • [9] The t → WZb decay in the Standard Model:: a critical reanalysis
    Altarelli, G
    Conti, L
    Lubicz, V
    [J]. PHYSICS LETTERS B, 2001, 502 (1-4) : 125 - 132
  • [10] ARGUIN JF, HEPEX0507091
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