THEME02-2-1124-2015/2017

Next theme	Prev. theme
to field of reseach	to contents

02-2-1124-2015/2017

Priority:

Status:

New

Search for New Physics in Experiments with the Fermilab High-Intensity Muon Beams

Leader:	V.V. Glagolev
Scientific leader:	J.A. Budagov

Participating Countries, Institutes and International organizations:
Belarus, Bulgaria, Georgia, Italy, Russia, Slovakia, USA, Ukraine.

Scientific Programme:
The muon anomalous magnetic moment a_µ can be measured and computed to high precision. The comparison between experiment and the SM therefore provides a sensitive search for New Physics (NP). At present, both measurement and theory have sub-part-per-million (ppm) uncertainties, and the "g-2 test" is being used to constrain SM extensions. The difference between experiment and theory,

a_µ(Expt-SM) = (255 ± 80)

10 ^-11 (3,2

, is a highly cited result and a possible harbinger of new TeV-scale physics. Potential explanations of the deviation include: supersymmetry, lepton substructure, dark matter loop etc., all well motivated by theory and consistent with other experimental constraints. Fermilab experiment has a plan to reduce the experimental uncertainty by a factor of 4 or more. A precise g-2 test, no matter where the final value lands, will sharply discriminate among models and will enter as one of the central observables in a global analysis of any SM extensions.
The Mu2e experiment at Fermilab is a dedicated search for the CLFV process µ ^- N

e ^- N, which is the coherent conversion of a muon into an electron in the vicinity of a nucleus. Once neutrinos masses are included, the process is allowed but effectively still absent since the rate is proportional to (

m ²_ij/M ²_W) ² , where

m ²_ij is the mass difference squared between i-th and j-th neutrino mass eigenstates, and M_W is the mass of the W-boson. The predicted rates for the µ ^-N

e ^-N and µ ⁺

e ⁺

CLFV processes are less than 10 ^-50 each. This makes this process a very theoretically clean place to search for NP effects. In many NP models that include a description of neutrino mass, the rates for these processes are enormously enhanced so that they occur at a level to which Mu2e experiment will have sensitivity.

Expected main results in 2015:

Simulation to define optimal crystal type and sizes for e.m. calorimeter of the Mu2e experiment.
Tests of the different type (LYSO, CsI, Baf2) e.m. calorimeter elements on the gamma sources and electron beam.
Tests of the extruded scintillation strips different geometry and manufacture with wave length shifter fibers readout to optimize the final version of counters.
Creation of the working version of the on-line control and data visualization program for Muon g-2 experiment and its integration in the common DAQ system.
Performing R@D for choosing optimal tracker detector element for Muon g-2 experiment.

List of projects:
	Project	Leader	Priority (period of realisation)
1.	Search for new physics in experiments with the Fermilab high-intensity muon beams	V.V. Glagolev	1 (2015-2017)

List of activities

Activity or experiment

Leaders

Status

Laboratory or other
Division of JINR
Responsible person

Main researchers

Experiment Mu2e

V.V. Glagolev

R&D
Realization

DLNP

A.M. Artikov, N.V. Atanov, O.S. Atanova, N.S. Azaryan, V.Yu. Baranov, V.Yu. Batusov, J.A. Budagov, D.Sh. Chokheli, Yu.I. Davydov, D.L. Demin, V.B. Flyagin, D.S. Guskov, Yu.N. Kharzheev, V.I. Kolomoets, S.M. Kolomoets, M.V. Lyablin, Yu.A. Koultchitski, V.M. Romanov, A.V. Sazonova, A.N. Shalóugin, A.V. Simonenko, S.N. Studenov, I.A. Suslov, A.K. Suhanova, I.V. Titkova, V.V. Tereschenko, S.V. Tereschenko, Z.U. Usubov

BLTP

D.I. Kazakov, G.A. Kozlov, O.V. Tarasov

LIT

V.V. Korenkov, V.V. Uzhinsky

VBLHEP

A. Galoyan

Experiment Muon g-2

N.V. Khomutov

R&D
Realization

DLNP

V.A. Baranov, V.N. Duginov, K.I. Gritsaj, A.S. Korenchenko, N.P. Kravchuk, N.A. Kuchinsky, T.N. Mamedov , A.I. Rudenko, V.P. Volnykh

VBLHE

S.A. Movchan

LRB

V.A. Krylov

Collaboration
Country or International Organization	City	Institute or Laboratory
Belarus	Minsk	NC PHEP BSU
		"INTEGRAL"
Bulgaria	Sofia	SU
Georgia	Tbilisi	HEPI-TSU
Italy	Pisa	UniPi
	Frascati	INFN LNF
Russia	Moscow, Troitsk	INR RAS
	Gatchina	PNPI
Slovakia	Bratislava	IP SAS
		CU
USA	Batavia, IL	Fermilab
	Charlottesville, VA	UVa
	Lexington, KY	UK
Ukraine	Kharkov	ISM NASU

Next theme	Prev. theme
to field of reseach	to contents