25 research outputs found
Quartic Anomalous Couplings in Colliders
We study the production of gauge boson pairs at the next generation of linear
colliders operating in the mode. The processes (, , or and or )
can give valuable information on possible deviations of the quartic vector
boson couplings from the Standard Model predictions. We establish the range of
the new couplings that can be explored in these colliders based on a
effect in the total cross section. We also present several kinematical
distributions of the final state particles that could manifest the underlying
new dynamics. Our results show that an collider can extend
considerably the bounds on anomalous interactions coming from oblique radiative
corrections and from direct searches in colliders.Comment: 21 pages and 7 figures appended as a postscript file (uuencoded),
MAD/PH/764, IFT-P.031/93, IFUSP-P 1047 (uses REVTeX3
Production of Three Vector Bosons in e+e- Annihilation as a Test of W+-, Z, gamma Self-Interactions
We study the vector-boson production processes e+e- --> WWZ and e+e-
-->WWgamma which are directly affected by the trilinear and quadrilinear self
couplings of the W, Z and gamma. Our analysis is based upon a single-parameter
effective-Lagrangian model for these self interactions which contains the
standard model as a special case. Consequences for the phenomenology at an e+e-
collider of 500 GeV (NLC) are discussed, and fits of the free parameter around
its standard model value are carried out.Comment: BI-TP 92/30, July 1992 (Enlarged Version October 1992) One section
added to the old version. Figures (unchanged) no more included but available
by reques
, , and pair productions at TeV colliders
We calculate the gauge-boson pairs , , ,
productions in the collisions, where the photon beam is realized
by the laser back-scattering method. These processes are important tests for
the non-abelian gauge sector of the standard model (SM). Precise calculations
of these processes can therefore probe the anomalous gauge-boson interactions.
Besides, these processes are important potential backgrounds for the
intermediate mass Higgs (IMH) search in the
production.Comment: Latex(Revtex), 17 pages, 5 figures in postscript format (uuencoded),
NUHEP-TH-92-2
Data Sovereignty in Community-Based Environmental Monitoring : Toward Equitable Environmental Data Governance
Non peer reviewe
Quartic Anomalous Couplings in Colliders
We study the constraints on the vertices ,
, and that can be obtained from
triple-gauge-boson production at the next generation of linear
colliders operating in the mode. We analyze the processes
(, or ) and show that these reactions
increase the potential of machines to search for anomalous
four-gauge-boson interactions.Comment: 15 pages, Latex file using ReVteX, 4 uufiled figures include
Challenges, Strategies, and Impacts of Doing Citizen Science with Marginalised and Indigenous Communities : Reflections from Project Coordinators
Citizen science is growing and increasingly realizing its potential in terms of benefiting science and society. However, there are significant barriers to engaging participants in non-Western, non-educated, non-industrialised, non-rich and non-democratic contexts. By reflecting on the experiences of 15 citizen science project coordinators, this paper contributes to the small but growing body of knowledge attempting to identify barriers and opportunities of doing citizen science with marginalised and Indigenous communities. Challenges affecting participation in the analysed projects include issues that range from lack of basic infrastructure and participant safety to unbalanced knowledge hierarchies and data rights. We found that, to overcome these challenges, projects have used several strategies, from promoting decentralized and low-tech solutions to engaging in bottom-up actions from a human-rights approach. Finally, our analysis of project impacts supports the idea that doing citizen science with marginalised and Indigenous communities might have a greater impact for participants than for science, as scientific achievements (although valuable) were not among the most important impacts highlighted in terms of project success. By providing stories from the field in a structured way, we aim to guide, to inform, and to inspire other citizen science projects, and to, ultimately, contribute to broader participation in citizen science in the future
Challenges, Strategies, and Impacts of Doing Citizen Science with Marginalised and Indigenous Communities: Reflections from Project Coordinators
Citizen science is growing and increasingly realizing its potential in terms of benefiting science and society. However, there are significant barriers to engaging participants in non-Western, non-educated, non-industrialised, non-rich and non-democratic contexts. By reflecting on the experiences of 15 citizen science project coordinators, this paper contributes to the small but growing body of knowledge attempting to identify barriers and opportunities of doing citizen science with marginalised and Indigenous communities. Challenges affecting participation in the analysed projects include issues that range from lack of basic infrastructure and participant safety to unbalanced knowledge hierarchies and data rights. We found that, to overcome these challenges, projects have used several strategies, from promoting decentralized and low-tech solutions to engaging in bottom-up actions from a human-rights approach. Finally, our analysis of project impacts supports the idea that doing citizen science with marginalised and Indigenous communities might have a greater impact for participants than for science, as scientific achievements (although valuable) were not among the most important impacts highlighted in terms of project success. By providing stories from the field in a structured way, we aim to guide, to inform, and to inspire other citizen science projects, and to, ultimately, contribute to broader participation in citizen science in the futur
Pair production of the heavy leptons associated with a gauge boson gamma or Z at the ILC
The T-odd leptons are the typical particles predicted by the littlest Higgs
model with T-parity (LHT model) and the observation of these particles might be
regarded as the direct evidence of the LHT model. In this paper, we investigate
the production of a pair of T-odd leptons associated with a gauge boson
( or ) at the international linear collider (ILC).
The numerical results show that the possible signals of the T-odd leptons may
be detected in the future ILC experiments.Comment: References added, published versio
Probing Anomalous Quartic Couplings in e-gamma and gamma-gamma Colliders
We analyze the potential of the e+e- Linear Colliders, operating in the
e-gamma and gamma-gamma modes, to probe anomalous quartic vector--boson
interactions through the multiple production of W's and Z's. We examine all
chiral operators of order p^4 that lead to new
four--gauge--boson interactions but do not alter trilinear vertices. We show
that the e-gamma and gamma-gamma modes are able not only to establish the
existence of a strongly interacting symmetry breaking sector but also to probe
for anomalous quartic couplings of the order of 10^{-2} at 90% CL. Moreover,
the information gathered in the e-gamma mode can be used to reduced the
ambiguities of the e+e- mode.Comment: Revtex, 18 pages, 6 figure