Z′ Effects and Anomalous Gauge Couplings at Lc With Polarization

Pankov, A.A.; Paver, N.; Verzegnassi, C.

doi:10.1142/s0217751x98000718

Cited by 10 publications

(12 citation statements)

References 13 publications

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“…With two independent parameters in Eqs. (17) and (18), the 95% CL is obtained by choosing χ 2 CL = 5.99. From the numerical procedure outlined above, we obtain the allowed regions in ∆ γ and ∆ Z determined from the differential polarized cross sections with different sets of polarization (as well as from the unpolarized process (1)) depicted in Fig.…”

Section: Z ′ Illustrationsmentioning

confidence: 99%

“…As regards the NP scenarios of interest here, one may remark that constraints on ∆ γ and ∆ Z of Eqs. (17) and (18) they constrain the whole class of Z ′ models considered. They may turn into constraints on the parameters of specific Z ′ models by replacing expressions (19) and (20).…”

Section: Analogous Tomentioning

confidence: 99%

“…1 In this paper, we study the indirect effects evidencing the mentioned extra Z ′ gauge bosons in W ± pair production (1) at the next generation e + e − International Linear Collider (ILC), with a center of mass energy √ s = 0.5−1 TeV and typical time-integrated luminosities of L int ∼ 0.5 − 1 ab −1 [12,13]. At the foreseen, really high luminosity this process should be quite sensitive to the indirect NP effects at a collider with M Z ≪ √ s ≪ M Z ′ [14][15][16][17][18][19], the deviations of cross sections from the SM predictions being expected to increase with √ s due to the violation of the SM gauge cancellation among the different contributions.…”

Section: Introductionmentioning

confidence: 99%

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Discriminating Z′ from anomalous trilinear gauge coupling signatures in e + e −→W + W − at ILC with polarized beams

Andreev

Moortgat‐Pick²,

Osland

et al. 2012

Eur. Phys. J. C

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New heavy neutral gauge bosons Z ′ are predicted by many models of physics beyond the Standard Model. It is quite possible that Z ′ s are heavy enough to lie beyond the discovery reach of the CERN Large Hadron Collider LHC, in which case only indirect signatures of Z ′ exchanges may emerge at future colliders, through deviations of the measured cross sections from the Standard Model predictions. We discuss in this context the foreseeable sensitivity to Z ′ s of W ± -pair production cross sections at the e + e − International Linear Collider (ILC), especially as regards the potential of distinguishing observable effects of the Z ′ from analogous ones due to competitor models with anomalous trilinear gauge couplings (AGC) that can lead to the same or similar new physics experimental signatures at the ILC. The sensitivity of the ILC for probing the Z-Z ′ mixing and its capability to distinguish these two new physics scenarios is substantially enhanced when the polarization of the initial beams and the produced W ± bosons are considered. A model independent analysis of the Z ′ effects in the process e + e − → W + W − allows to differentiate the full class of vector Z ′ models from those with anomalous trilinear gauge couplings, with one notable exception: the sequential SM (SSM)-like models can in this process not be distinguished from anomalous gauge couplings. Results of model dependent analysis of a specific Z ′ are expressed in terms of discovery and identification reaches on the Z-Z ′ mixing angle and the Z ′ mass.

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Section: Z ′ Illustrationsmentioning

confidence: 99%

Section: Analogous Tomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Discriminating Z′ from anomalous trilinear gauge coupling signatures in e + e −→W + W − at ILC with polarized beams

Andreev

Moortgat‐Pick²,

Osland

et al. 2012

Eur. Phys. J. C

Self Cite

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“…The center-edge and total cross sections can at the parton level be defined like for initial-state electrons and positrons [11,19]:…”

Section: )mentioning

confidence: 99%

“…In this paper we shall discuss a technique that makes use of the specific modifications in angular distributions induced by spin-2 exchanges. This method is based on the centeredge asymmetry A CE [11,19], an integrated observable which offers a way to uniquely identify KK graviton exchange (or any other spin-2 exchange). In a situation with limited statistics, this may represent an advantage over a fit to the angular distribution.…”

Section: Introductionmentioning

confidence: 99%

Center-edge asymmetry at hadron colliders

et al. 2004

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We investigate the possibility of using the center-edge asymmetry to distinguish graviton exchange from other new physics effects at hadron colliders. Specifically, we study leptonpair production within the ADD and RS scenarios. At the Tevatron, the graviton-Z interference is the most important contribution to the center-edge asymmetry, whereas at the LHC, the dominant contribution comes from gluon fusion via graviton exchange, which has no analogue at e + e − colliders. We find that spin-2 and spin-1 exchange can be distinguished up to an ADD cut-off scale, M H , of about 5 TeV, at the 95% CL. In the RS scenario, spin-2 resonances can be identified in most of the favored parameter space.

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The phenomenology of extra neutral gauge bosons

1999

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The phenomenological constraints on extra neutral gauge bosons at present and at future colliders are reviewed. Special attention is paid to the influence of radiative corrections, systematic errors, and kinematic cuts on the Z ′ constraints. Simple estimates of the Z ′ constraints from different reactions are derived. They make the physical origin of these constraints transparent. The results existing in the literature are summarized and compared with the estimates. The consequence of model assumptions on the Z ′ constraints is discussed. The paper starts with an overview of Z ′ parameters and the possible links between them by model assumptions. It continues with a discussion of Z ′ limits and Z ′ measurements in different reactions at e + e − and µ + µ − colliders. It follows an overview of the corresponding limits at proton colliders. Possible Z ′ constraints from other reactions as ep collisions, atomic parity violation, neutrino scattering and cosmology are briefly mentioned.

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Z′ Effects and Anomalous Gauge Couplings at Lc With Polarization

Cited by 10 publications

References 13 publications

Discriminating Z′ from anomalous trilinear gauge coupling signatures in e + e −→W + W − at ILC with polarized beams

Discriminating Z′ from anomalous trilinear gauge coupling signatures in e + e −→W + W − at ILC with polarized beams

Center-edge asymmetry at hadron colliders

The phenomenology of extra neutral gauge bosons

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