150 research outputs found
Anomalous couplings with beam polarization at the Compact Linear Collider
We study the anomalous couplings at the Compact Linear Collider
through the processes , and is the Weizsacker-Williams
photon). We give the 95\% confidence level limits for unpolarized and polarized
electron (positron) beam on the anomalous couplings for various values of the
integrated luminosities and center-of-mass energies. We show that the obtained
limits on the anomalous couplings through these processes can highly improve
the current experimental limits. In addition, our limits with beam polarization
are approximately two times better than the unpolarized case.Comment: Tables and references adde
Anomalous quartic couplings in collisions at the LHeC and the FCC-he
We conducted a study on measuring production and on the sensitivity
limits at Confidence Level on thirteen anomalous couplings obtained by
dimension-8 operators which are related to the anomalous quartic
couplings. We consider the main reaction with the sub-process at
the Large Hadron electron Collider (LHeC) and the Future Circular
Collider-hadron electron (FCC-he). For the LHeC, energies of the beams
are taken to be and 140 GeV and the energy of the beams is taken
to be TeV. For the FCC-he, energies of the beams are taken to
be and 140 GeV and the energy of the beams is taken to be TeV, respectively. It is interesting to notice that the LHeC and the FCC-he
will lead to model-independent limits on the anomalous quartic
couplings which are one order of magnitude stringent than the CMS Collaboration
limits, in addition to being competitive with other limits reported in the
literature.Comment: 28 pages, 10 Figures and 13 Table
Projected Sensivity to Dimension-6 Triple Gauge Couplings at the FCC-hh
In this study, we investigate the process for
the physics potential of the FCC-hh with TeV to examine the
anomalous couplings defined by three CP-conserving and two
CP-violating effective operators of dimension-6. The analysis containing the
realistic detector effects is carried out in the mode where bosons in
the final state decay into the leptonic channel. The best sensitivities
obtained from the process on the anomalous
couplings and determined by
CP-conserving effective Lagrangians are TeV and TeV, while and couplings defined by CP-violating effective Lagrangian are
obtained as TeV and TeV at the
FCC-hh with TeV, ab. However, if the
systematic uncertainty is included, we obtain reduced sensitivities on the
anomalous coupling . The results are compared for assumed
systematics of and .Comment: 17 pages, 6 Figures and Tables I
Search for the anomalous and gauge couplings through the process with unpolarized and polarized beams
This work offers the constraints on the anomalous neutral triple gauge
couplings (aNTGC) for the process at the CLIC with
TeV. The realistic CLIC detector environments and their effects
are considered in our analysis. The study is planned for the decays of
producted bosons to a pair of charged leptons (electrons or muons) and
neutrino pairs. The bounds on the aNTGCs defining -conserving
coupling and three -violating
, , and couplings
are obtained. Also, the effects and advantages of polarization for incoming
electron beams in these calculations are investigated.Comment: 21 pages, 14 figure
Study of the projected sensitivity on the anomalous quartic gauge couplings via production at the CLIC
Gauge boson self-couplings are completely defined by the non-Abelian gauge
symmetry of the Standard Model (SM), thus direct search for these couplings are
extremely significant in understanding the gauge structure of the SM. The
possible deviation from the SM predictions of gauge boson self-couplings would
be a sign of the presence of new physics beyond the SM. In this work, we study
the sensitivities on the anomalous couplings defined by dimension-8 operators
related to the and quartic vertices
through the process with Z-boson decaying to charged
leptons at the Compact Linear Collider (CLIC). We analyze the center-of-mass
energy of 3 TeV, integrated luminosities of ,
systematic uncertainties of , and unpolarized and
polarized electron beams for extraction of expected sensitivity on the
anomalous couplings at confidence level, which are
especially sensitive to the channel. It is clear from the
results that if the systematic error is improved, we expect better limits on
the couplings. The best limits obtained on the anomalous quartic couplings for
the process with TeV,
and can be approximately improved up to about
two times better than the limits obtained with . Our
sensitivities on the anomalous quartic couplings with can
set more stringent sensitivity by two orders of magnitude concerning the best
sensitivity derived from the current experimental limits. Finally, with initial
electron beam polarization, the sensitivity of the anomalous quartic couplings
improves by almost a factor of 1.2.Comment: 38 pages, 22 figure
Study on the anomalous quartic couplings of electroweak bosons in collisions at the LHeC and the FCC-he
In this paper, a study is carried out on the production to probe quartic couplings
using 10, 100 of collisions data at = 1.30,
1.98 GeV at the Large Hadron electron Collider (LHeC) and 100, 1000 with = 3.46, 5.29 GeV at the Future Circular
Collider-hadron electron (FCC-he). Production cross-sections are determined for
both at leptonic and hadronic decay channel of the -boson. With the data
from future colliders, it is possible to obtain sensitivity measures at
C.L. on the anomalous and
couplings which are competitive with the limits obtained by the LHC, as well as
with others limits reported in the literature. The production mode in collisions offers a window for
study the quartic electroweak bosons couplings at the LHeC
and the FCC-he, which provides a much cleaner collision environment than the
LHC.Comment: 27 pages , 10 figure
Study on the anomalous quartic W+W-yy couplings of electroweak bosons in e-p collisions at the LHeC and the FCC-he
In this paper, a study is carried out on the e−p --> e−y*p --> pW−ynu_e production to probe quartic W+W−yy couplings at the Large Hadron electron Collider (LHeC) with s= 1.30, 1.98 TeV and at the Future Circular Collider-hadron electron (FCC-he) with s= 3.46, 5.29 TeV. Production cross-sections are determined for both at leptonic and hadronic decay channels of the W-boson. With the data from future e−p colliders, it is possible to obtain sensitivity measures at 95% C.L
An Alternative Treatment for Yukawa-Type Potentials
We propose a new approximation scheme to obtain analytic expressions for the
bound state energies and eigenfunctions of Yukawa like potentials. The
predicted energies are in excellent agreement with the accurate numerical
values reported in the literature
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