Dear All,
just a quick email concerning the discussion of question HE2:
"HE2": ? How much do we gain from searches for e.g. triple-gauge-couplings
in
> light of precision electroweak data? Is there any kind of theory where
we
> expect to naturally have SM-like precision measurements, but large
deviations
> in the TGCs?
If I understand this question correctly,
one approach to study indirect
effects of non-standard gauge couplings in Z boson observables
and their direct effects in VV and VVV production is based on the EFT
approach and has been pursued, e.g., here:
http://inspirehep.net/record/647437?ln=en
http://prd.aps.org/abstract/PRD/v48/i5/p2182_1
The EWK WG is already using the EFT approach to study direct effects of
non-SM couplings in multiple-gauge boson production. If we can convince
ourselves that this approach can be savely extended to the loop
calculations of Z observables, we could try to initiate an update of these
older studies to answer part of this question.
I look forward to discussing this interesting topic in more detail
tomorrow.
Cheers,
Doreen
On Wed, 24 Apr 2013, Chip Brock wrote:
> Hello EF Conveners,
>
> We will have our first weekly EF Convener's phone call tomorrow, Thursday.
>
> Energy Frontier Conveners' meeting
>
> April 25: 11:00 PDT / 2:00 EDT
> Contact information:
>
> You call: domestic... (877)287-0283
> international...(303)433-0165
>
> participant code: 290-043
>
> We will start the meeting promptly and end promptly after 1 hour.
>
> Agenda items
>
> 1. How did Vidyo work for you at Brookhaven? What do you require from the
> Seattle organizers?
>
> 2. We need to propose sessions of general interest for the parallel-session
> days at Minnesota. Michael started a list below. Please add to it. We've
> attached the first-pass block schedule discussed in the Snowmass conveners'
> meeting last week.
>
> 3. We need to propose questions to the other frontiers. These should in
> particular address issues that were not covered by the Cosmic Frontier's
> list. Some examples are given below. Please add more. We'll read them and
> briefly discuss them.
>
> 4. And, in turn we will devote time in these meetings to discussing how we
> will respond to the questions to us from Cosmic Frontier and others. Today,
> we will discuss the two questions below. For the moment, it would be good to
> know if we are on track to answer these questions or, if not, what studies
> are needed.
>
> Thank you,
>
> Chip and Michael
>
> -----------------------------------------------------------------------
>
> Titles for Sessions of General Interest at Minnesota:
>
> 1. Dark Matter -- attempt a perspective including all detection methods
> including direct searches, and comparison of their reach (needs to be
> organized with CF)
>
> 2. Lepton Flavor Violation -- what new physics models are accessed by mu-e
> conversion, mu-> e gamma, and tau-> ell gamma experiments now being planned?
> How are these compared to direct search capabilities? Can we see lepton
> flavor violation at colliders? (needs to be organized with IF)
>
> 3. Future of the Higgs -- To what extent have we already ruled out models of
> the Higgs field beyond the simple Standard Model. What are examples of models
> that require precision measurements at different levels? What should be the
> goal in precision Higgs measurement?
>
> 4. Instrumentation for High-Luminosity Hadron Colliders -- what are the
> emerging technologies for confronting the problems of triggering, heavy
> flavor ID, and precision measurement with high pileup? (needs to be organized
> with Inst. F.)
>
> -----------------------------------------------------------------------------
>
> Pump-priming questions to other frontiers:
>
> EF-IF1: We would like to understand the increase in sensitivity to new
> particles in loops as a function of time for the g-2, mu-e conversion, tau ->
> ell gamma, and EDM experiments. Can we plot this evolution along with the
> evolution in sensitivity predicted for direct searches for new particles at
> the LHC?
>
> EF-InstF1: High luminosity running will depend on efficient triggering in a
> difficult environment. Isolation requirements will likely be compromised
> which may place a premium on tracking for lepton triggering. What are the few
> most promising enabling technologies for electron/photon/tau triggers in an
> environment, considering luminosities up to 10^{35} cm^{-2}s^{-1}? What are
> likely R&D paths to realizing these technologies?
>
> EF-CF1: If dark matter has no SM interactions stronger than gravitational,
> are there any prospects for discovering its particle nature?
>
>
> [Daniel Whiteson also proposed the question:
>
> EF-EF!: What is our best guess at the probability that a 33 TeV (100 TeV) pp
> machine will discover nothing new? [ note: this may be unanswerable, but it's
> sort of the big elephant in the room ]
>
> We think that this must be discussed in some way in our reports. Another way
> to ask the question is, if there is no BSM physics at the HL-LHC, what is the
> motivation to go to higher energy? ]
>
> -------------------------------------------------------------------------------
>
> Questions to us from the Cosmic Frontier, to be discussed today:
>
> "HE1": ? The message from the LHC seems to be that with data in hand, we
> consistently outperform expectations for extraction of Higgs properties. How
> much is there really for an ILC to contribute? What key assumptions are we
> making now that we could relax with ILC inputs?
>
> "HE2": ? How much do we gain from searches for e.g. triple-gauge-couplings in
> light of precision electroweak data? Is there any kind of theory where we
> expect to naturally have SM-like precision measurements, but large deviations
> in the TGCs?
>
> ---------------------------------------------------------------------------------
>
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--
----------------------------------------------------------
Doreen Wackeroth
Professor of Physics
Department of Physics
239 Fronczak Hall
University at Buffalo - The State University of New York
Buffalo, NY 14260-1500, USA
Phone: (716) 645-5445
Fax: (716) 645-2507
Homepage: http://ubpheno.physics.buffalo.edu/~dow
E-mail: [log in to unmask]
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