Search for a heavy neutral gauge boson in the dielectron channel with 5.4 fb−1 of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math> collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>1.96</mml:mn><mml:mtext> TeV</mml:mtext></mml:math>

Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M. R.; Adams, T.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Alverson, G.; Alves, G. A.; Ancu, L. S.; Aoki, M.; Arnoud, Y.; Arov, M.; Askew, A.; Åsman, B.; Atramentov, O.; Ávila, C.; Backusmayes, J.; Badaud, F.; Bagby, L.; Baldin, B.; Bandurin, D. V.; Banerjee, S.; Barberis, E.; Baringer, P.; Barreto, J.; Bartlett, J.F.; Bassler, U.; Beale, S.; Bean, A.; Begalli, M.; Begel, M.; Bélanger-Champagne, C.; Bellantoni, L.; Benitez, J. A.; Beri, S. B.; Bernardi, G.; Bernhard, R.; Bertram, I.; Besançon, M.; Beuselinck, R.; Bezzubov, V. A.; Bhat, P. C.; Bhatnagar, V.; Blazey, G.; Blessing, S.; Bloom, K.; Boehnlein, A.; Boline, D.; Bolton, T.; Boos, E.; Borissov, G.; Bose, T.; Brandt, A.; Brandt, O.; Brock, R.; Brooijmans, G.; Bross, A.; Brown, D.; Brown, J.; Bu, X. B.; Buchholz, D.; Buehler, M.; Buescher, V.; Bunichev, V.; Burdin, S.; Burnett, T. H.; Buszello, C. P.; Calpas, B.; Calvet, S.; Camacho-Pérez, E.; Carrasco-Lizarraga, M. 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doi:10.1016/j.physletb.2010.10.059

Cited by 63 publications

(20 citation statements)

References 24 publications

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“…The horizontal, dashed line indicates the standard GUT predicted g 1 value. The dash-dotted lines are cross section limits on the E 6 SSM Z from D∅ [12], CMS [13] and ATLAS [14] that have been converted to limits on the coupling g 1 .…”

Section: Little Z Modelsmentioning

confidence: 99%

LittleZ′models

2013

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We propose a new class of models called Little Z models in order to reduce the fine-tuning due to the current experimental limits on the Z mass in E 6 inspired supersymmetric models, where the Higgs doublets are charged under the extra U (1) gauge group. The proposed Little Z models allow a lower mass Z due to the spontaneously broken extra U (1) gauge group having a reduced gauge coupling. We show that reducing the value of the extra gauge coupling relaxes the experimental limits, leading to the possibility of low mass Z resonances, for example down to 200 GeV, which may yet appear in LHC searches. Although the source of tree level fine-tuning due to the Z mass is reduced in Little Z models, it typically does so at the expense of increasing the vacuum expectation value of the U (1) -breaking standard model singlet field, reducing the fine-tuning to similar levels to that in the Minimal Supersymmetric Standard Model.

show abstract

Section: Little Z Modelsmentioning

confidence: 99%

LittleZ′models

2013

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show abstract

“…Especially, the precision measurements at the Z pole give limit on the Z − Z ′ mixing [16]. Bounds on several models containing extra neutral gauge bosons have been set by both the CDF and D0 experiments by measuring high energy lepton pair production cross sections at Tevatron [17,18]. Due to the high luminosity and collision energy, the large hadron collider (LHC) implies more promising potential to observe heavy gauge bosons.…”

Section: Introductionmentioning

confidence: 99%

Search forZ′viaZHassociated production at the LHC

Yang

et al. 2013

Phys. Rev. D

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Many new physics models predict the existence of extra neutral gauge bosons (Z ′ ).Inspired by the recent development on Higgs search, we study the properties of Z ′ via the Higgs and Z boson associated production. The couplings of Z ′ to quarks can be investigated through pp → Z ′ → ZH → l + l − bb process, which also provides extraordinary signal for understanding the properties of Z ′ ZH interaction. The standard model background processes can be significantly suppressed by adopting appropriate kinematic cuts. The charged lepton angular distributions are related to the ratio of chiral couplings of Z ′ to quarks via Z ′ ZH interaction.

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“…The cross section for other values of the product g BL sin θ BL can be estimated by the scaling in the cross section which at the Z ′ resonance scales like g 2 BL sin 2 θ BL . The top panel gives a similar analysis for the Tevatron using the DØ data with 5.4/fb of integrated luminosity [88]. From the analysis of figure 1 we observe that at present the Tevatron bound is about as strong as the present LHC bound.…”

Section: Jhep01(2012)038mentioning

confidence: 61%

“…testable in collider experiments much like the hypercharge Stueckelberg Z ′ on which the DØ currently has experimental bounds [88]. Further, the decay of the Stueckelberg Z ′ into leptonic channels will be much more than in the hadronic channels because the branching ratios are proportional to (B − L) 2 .…”

Section: Jhep01(2012)038mentioning

confidence: 99%

R-parity conservation via the Stueckelberg mechanism: LHC and Dark Matter Signals

Feldman

Pérez

Nath

2012

J. High Energ. Phys.

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Abstract:We investigate the connection between the conservation of R-parity in supersymmetry and the Stueckelberg mechanism for the mass generation of the B − L vector gauge boson. It is shown that with universal boundary conditions for soft terms of sfermions in each family at the high scale and with the Stueckelberg mechanism for generating mass for the B − L gauge boson present in the theory, electric charge conservation guarantees the conservation of R-parity in the minimal B − L extended supersymmetric standard model. We also discuss non-minimal extensions. This includes extensions where the gauge symmetries arise with an additional U(1) B−L ⊗ U(1) X , where U(1) X is a hidden sector gauge group. In this case the presence of the additional U(1) X allows for a Z ′ gauge boson mass with B − L interactions to lie in the sub-TeV region overcoming the multi-TeV LEP constraints. The possible tests of the models at colliders and in dark matter experiments are analyzed including signals of a low mass Z ′ resonance and the production of spin zero bosons and their decays into two photons. In this model two types of dark matter candidates emerge which are Majorana and Dirac particles. Predictions are made for a possible simultaneous observation of new physics events in dark matter experiments and at the LHC.

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Search for a heavy neutral gauge boson in the dielectron channel with 5.4 fb−1 of pp¯ collisions at s=1.96 TeV

Cited by 63 publications

References 24 publications

LittleZ′models

LittleZ′models

Search forZ′viaZHassociated production at the LHC

R-parity conservation via the Stueckelberg mechanism: LHC and Dark Matter Signals

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