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NOJIRI MIHOKO

 
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NameNOJIRI MIHOKO
AffiliationInstitute of Particle and Nuclear Studies
Job titleProfessor
DegreeDoctor of Science
Research funding number30222201
Twitter IDmihoko_nojiri

Research Interests

 
Elementary Particles Physics , Cosmic Ray Physics and Cosmic Physics

Research Areas

 
  • Physics / Particle/Nuclear/Cosmic ray/Astro physics / 

Academic & Professional Experience

 
Oct 2007
 - 
Today
PI, IPMU, Tokyo University
 
Jan 2006
 - 
Mar 2007
IPNS, KEK
 

Education

 
 
 - 
1990
Graduate School, Division of Natural Science, Kyoto University
 
 
 - 
1985
Faculty of Science, Kyoto University
 

Misc

 
Keisuke Harigaya, Takafumi Igari, Mihoko M. Nojiri, Michihisa Takeuchi, Kazuhiro Tobe
JHEP 03(2014) 105      Mar 2014   [Refereed]
In this paper, we consider phenomenology of a model with an Tex
gauge symmetry. Since the muon couples to the Tex gauge boson
(called Tex boson), its contribution to the muon anomalous magnetic moment
(muon g-2) can account...
Howard Baer, Mikael Berggren, Jenny List, Mihoko M. Nojiri, Maxim Perelstein, Aaron Pierce, Werner Porod, Tomohiko Tanabe
   Jul 2013
The International Linear Collider (ILC) has recently proven its technical
maturity with the publication of a Technical Design Report, and there is a
strong interest in Japan to host such a machine. We summarize key aspects of
the Beyond the Standa...
Biplob Bhattacherjee, Shigeki Matsumoto, Satyanarayan Mukhopadhyay, Mihoko M. Nojiri
JHEP10(2013)032      Jun 2013   [Refereed]
Asymmetric dark matter (ADM) has been an attractive possibility attempting to
explain the observed ratio of baryon to dark matter abundance in the universe.
While a bosonic ADM is constrained by the limits from existence of old neutron
stars, a fe...
Biplob Bhattacherjee, Debajyoti Choudhury, Keisuke Harigaya, Shigeki Matsumoto, Mihoko M. Nojiri
JHEP 1304 (2013) 031      Dec 2012   [Refereed]
Present and future expected limits on interactions between dark matter and
various quarks are thoroughly investigated in a model-independent way. In
particular, the constraints on the interactions from the Large Hadron Collider
(LHC) experiment ar...
Biplob Bhattacherjee, Sourav K. Mandal, Mihoko Nojiri
JHEP 1303 (2013) 105      Nov 2012   [Refereed]
Top polarization is an important probe of new physics that couples to the top
sector, and which may be discovered at the 14 TeV LHC. Taking the example of
the MSSM, we argue that top polarization measurements can put a constraint on
the soft super...
Ben Gripaios, Keiko Nagao, Mihoko Nojiri, Kazuki Sakurai, Bryan Webber
JHEP 03(2013)106      Oct 2012   [Refereed]
We propose a method for reconstructing the mass of a particle, such as the
Higgs boson, decaying into a pair of tau leptons, of which one subsequently
undergoes a 3-prong decay. The kinematics is solved using information from the
visible decay pro...
Hirohisa Kubota, Mihoko Nojiri
Phys.Rev. D87 (2013) 076011      Jul 2012   [Refereed]
In this paper we study the higgs-radion system of the Randall-Sundum model
where matter and gauge fields live in the bulk. We take into account the
Kalza-Klein(KK) loop correction for the higgs and the raidion coupling to the
gauge bosons. Inspire...
Keisuke Harigaya, Shigeki Matsumoto, Mihoko M. Nojiri, Kohsaku Tobioka
   Apr 2012
Vector-like quarks are introduced in various new physics models beyond the
standard model (SM) at the TeV scale. We especially consider the case that the
quark is singlet (triplet) under the SU(2)Tex (SU(3)Tex) gauge group and
couples only to th...
Keisuke Harigaya, Shigeki Matsumoto, Mihoko M. Nojiri, Kohsaku Tobioka
JHEP 1201 (2012) 135      Sep 2011   [Refereed]
In the framework of the little higgs scenario, coupling constants of several
interactions are related to each other to guarantee the stability of the higgs
boson mass at one-loop level. This relation is called the little higgs
mechanism. We discus...
Hitoshi Murayama, Mihoko M. Nojiri, Kohsaku Tobioka
PhysRevD.84:094015,2011      Jul 2011   [Refereed]
We study the discovery potential of the Minimal Universal Extra Dimension
model (MUED) and improve it utilizing the multijet + lepton mode at the LHC.
Since the MUED has a nearly degenerate spectrum, most events only have soft
jets and small Emiss...
Subhaditya Bhattacharya, Sanjoy Biswas, Biswarup Mukhopadhyaya, Mihoko M. Nojiri
   May 2011
We discuss large non-universality in the Higgs sector at high scale in
supersymmetric theories, in the context of the Large Hadron Collider (LHC). In
particular, we note that if Tex is large and negative
($\simeq 10^6 {\rm ~G...
Daniele Alves, Nima Arkani-Hamed, Sanjay Arora, Yang Bai, Matthew Baumgart, Joshua Berger, Matthew Buckley, Bart Butler, Spencer Chang, Hsin-Chia Cheng, Clifford Cheung, R. Sekhar Chivukula, Won Sang Cho, Randy Cotta, Mariarosaria D'Alfonso, Sonia El Hedri, Rouven Essig, Jared A. Evans, Liam Fitzpatrick, Patrick Fox, Roberto Franceschini, Ayres Freitas, James S. Gainer, Yuri Gershtein, Richard Gray, Thomas Gregoire, Ben Gripaios, Jack Gunion, Tao Han, Andy Haas, Per Hansson, JoAnne Hewett, Dmitry Hits, Jay Hubisz, Eder Izaguirre, Jared Kaplan, Emanuel Katz, Can Kilic, Hyung-Do Kim, Ryuichiro Kitano, Sue Ann Koay, Pyungwon Ko, David Krohn, Eric Kuflik, Ian Lewis, Mariangela Lisanti, Tao Liu, Zhen Liu, Ran Lu, Markus Luty, Patrick Meade, David Morrissey, Stephen Mrenna, Mihoko Nojiri, Takemichi Okui, Sanjay Padhi, Michele Papucci, Michael Park, Myeonghun Park, Maxim Perelstein, Michael Peskin, Daniel Phalen, Keith Rehermann, Vikram Rentala, Tuhin Roy, Joshua T. Ruderman, Veronica Sanz, Martin Schmaltz, Stephen Schnetzer, Philip Schuster, Pedro Schwaller, Matthew D. Schwartz, Ariel Schwartzman, Jing Shao, Jessie Shelton, David Shih, Jing Shu, Daniel Silverstein, Elizabeth Simmons, Sunil Somalwar, Michael Spannowsky, Christian Spethmann, Matthew Strassler, Shufang Su, Tim Tait, Brooks Thomas, Scott Thomas, Natalia Toro, Tomer Volansky, Jay Wacker, Wolfgang Waltenberger, Itay Yavin, Felix Yu, Yue Zhao, Kathryn Zurek
2012 J. Phys. G: Nucl. Part. Phys. 39 105005      May 2011
This document proposes a collection of simplified models relevant to the
design of new-physics searches at the LHC and the characterization of their
results. Both ATLAS and CMS have already presented some results in terms of
simplified models, and...
Butsuri   66(5) 380-385   May 2011
Mihoko M. Nojiri, Jing Shu
JHEP 1106:047,2011      Jan 2011
We consider the spin determination of new colored particles in the missing
energy plus jets channel at the early stage of LHC. We use a three site moose
model to describe the low energy Lagrangian of all same spin partner (LHT or
UED like) models ...
Won Sang Cho, William Klemm, Mihoko M. Nojiri
Phys.Rev.D84:035018,2011      Aug 2010
We report a new possibility of using the Tex (Constransverse mass)
variable for mass measurement in single step decay chains involving missing
particles with moderate transverse momentum. We show that its experimental
feasibility is enhanced c...
Mihoko M. Nojiri, Kazuki Sakurai, Bryan R. Webber
   May 2010
A method is proposed for determining the masses of the new particles N,X,Y,Z
in collider events containing a pair of effectively identical decay chains Z to
Y+jet, Y to X+l_1, X to N+l_2, where l_1, l_2 are opposite-sign same-flavour
charged lepto...
Chuan-Ren Chen, Mihoko M. Nojiri, Seong Chan Park, Jing Shu
   Aug 2009
Kaluza-Klein photon in universal extra dimension models is one of the most
attractive dark matter candidates as a weakly interacting massive particle.
Having a characteristic split spectrum in split universal extra dimension the
relic density of K...
Sung-Gi Kim, Nobuhiro Maekawa, Keiko I. Nagao, Mihoko M. Nojiri, Kazuki Sakurai
JHEP 0910:005,2009      Jul 2009
We study the LHC signature of the minimal supersymmetric standard model with
non-universal sfermion masses. In the model, soft masses of gauginos and the
3rd generation of 10 of SU(5) are around the weak scale, while other sfermion
soft mass is un...
Johan Alwall, Kenji Hiramatsu, Mihoko M. Nojiri, Yasuhiro Shimizu
Phys.Rev.Lett.103:151802,2009      May 2009
At hadron colliders, the production of heavy new particles is associated with
additional quarks and gluons with significant transeverse momentum. The
additional jets complicates the reconstruction of new particle masses. Taking
gluino pair product...
Norita Kawanaka, Kunihito Ioka, Mihoko M. Nojiri
Astrophys.J.710:958-963,2010      Mar 2009
We investigate the observed spectrum of cosmic-ray electrons and positrons
from astrophysical sources, especially pulsars, and the physical processes for
making the spectrum spiky or smooth via continuous and multiple
electron/positron injections....
Chuan-Ren Chen, Mihoko M. Nojiri, Seong Chan Park, Jing Shu, Michihisa Takeuchi
   Mar 2009
We explicitly show that split-universal extra dimension (split-UED), a
recently suggested extension of universal extra dimension (UED) model, can
nicely explain recent anomalies in cosmic-ray positrons and electrons observed
by PAMELA and ATIC/PPB...
Junji Hisano, Mihoko M. Nojiri, Warintorn Sreethawong
JHEP 0906:044,2009      Dec 2008
Current limit on the dark matter relic abundance may suggest that Tex
should be smaller than prediction in the minimal supergravity scenario (mSUGRA)
for moderate Tex and Tex. The electroweak-ino parameter Tex and
Tex are th...
Chuan-Ren Chen, Mihoko M. Nojiri, Fuminobu Takahashi, T. T. Yanagida
Prog.Theor.Phys.122:553-559,2009      Nov 2008
We show that the PAMELA anomaly in the positron fraction as well as the
ATIC/PPB-BETS excesses in the e^- + e^+ flux are simultaneously explained in
our scenario that a hidden U(1)H gauge boson constitutes dark matter of the
Universe and decays in...
Mihoko M. Nojiri
AIP Conf.Proc.1078:79-83,2009      Sep 2008
I review recent developments on the use of mT2 variables for SUSY parameter
study, which might be useful for the data analysis in the early stage of the
LHC experiments. I also review some of recent interesting studies. Talk in
SUSY08.
Mihoko M. Nojiri, Kazuki Sakurai, Yasuhiro Shimizu, Michihisa Takeuchi
JHEP0810:100,2008      Aug 2008
The ATLAS and CMS experiments at the Large Hadron Collider (LHC) may discover
the squarks (\tilde{q}) and gluino (\tilde{g}) of the minimal supersymmetric
standard model (MSSM) in the early stage of the experiments if their masses are
lighter than...
Mihoko M. Nojiri, Michihisa Takeuchi
JHEP0810:025,2008      Feb 2008
In the Littlest Higgs model with T-parity (LHT), top-partners (T_-) are
produced in pairs at the Large Hadron Collider (LHC). Each top-partner decays
into a top quark (t) and the lightest T-odd gauge partner A_H. We demonstrate
reconstruction of t...
Mihoko M. Nojiri, Yasuhiro Shimizu, Shogo Okada, Kiyotomo Kawagoe
JHEP0806:035,2008      Feb 2008
We propose an inclusive analysis of a stransverse mass (m_{T2}) using a
hemisphere method for supersymmetry studies at the LHC . The hemisphere method
is an algorithm to group collinear and high p_T particles and jets, assuming
that there are two ...
Nojiri Mihoko M.
Butsuri   62(12) 929-935   Dec 2007
We now believe that the dark matter in our Universe must be an unknown elementray particle, which is charge neutral and weakly interacting. The standard model must be extended to include it. The dark matter was likely produced in the early univers...
Mihoko M. Nojiri, Michihisa Takeuchi
Phys.Rev.D76:015009,2007      Jan 2007
Tex production is one of the main SUSY production
processes in the MSSM, which occurs due to the chirality flip caused by the
Majorana gluino mass. This process is one of the sources of same sign two
lepton (SS2Tex) events, h...
Shigeki Matsumoto, Mihoko M. Nojiri, Daisuke Nomura
Phys.Rev.D75:055006,2007      Dec 2006
We study the Littlest Higgs model with T-parity at the LHC through pair
productions of the T-odd top quark partner (T_-) which decays into the top
quark and the lightest T-odd particle. We identify the region of parameters
favored by the electrowe...
Koichi Hamaguchi, Mihoko M. Nojiri, Albert de Roeck
JHEP 0703:046,2007      Dec 2006
If the scalar tau Tex is the next lightest supersymmetric particle and
decays into a gravitino (Tex) being the lightest supersymmetric
particle, it will have generally a very long lifetime. In this paper, we
investigate the possibilit...
Kiyotomo Kawagoe, Mihoko M. Nojiri
Phys.Rev. D74 (2006) 115011      Jun 2006
Discovery of supersymmetric (SUSY) particles at the Large Hadron
Collider(LHC) has been studied for the models where squarks and gluino are much
heavier than the lightest supersymetric particle (LSP). In this paper, we
investigate the SUSY discove...
Junji Hisano, Minoru Nagai, Mihoko M. Nojiri, Masato Senami
Phys.Rev. D73 (2006) 031701      Apr 2005
We investigate a possibility of neutralino dark matter (DM) direct detection
in the future electron accelerators. That is counting of high p_T electron
recoil events by neutralinos in halo. If selectron and neutralino masses would
be precisely mea...
Physical Review   D71:035008    2005
Junji Hisano, Shigeki. Matsumoto, Mihoko M. Nojiri, Osamu Saito
Phys.Rev. D71 (2005) 063528      Dec 2004
Detection of gamma rays from dark matter annihilation in the galactic center
is one of the feasible techniques to search for dark matter. We evaluate the
gamma ray flux in the case that the dark matter has an electroweak SU(2)_L
charge. Such dark ...
Yukihiro Kato, Keisuke Fujii, Teruki Kamon, Vadim Khotilovich, Mihoko M. Nojiri
Phys.Lett. B611 (2005) 223-230      Nov 2004
The lighter chargino pair production (Tex) is one of key processes for determination of
supersymmetric parameters at a linear collider. If Tex is a large
value, the lighter stau ($\tilde{\...
Mihoko M. Nojiri
   Nov 2004
At the LHC, superpartners with the masses lighter than a few TeV may be
found, and the masses of the supersymmetric (SUSY) particles and their
interactions will be studied. The information would be the base to consider the
SUSY breaking mechanism ...
Koichi Hamaguchi, Yoshitaka Kuno, Tsuyoshi Nakaya, Mihoko M. Nojiri
Phys.Rev.D70:115007,2004      Sep 2004
In models where the gravitino is the lightest supersymmetric particle (LSP),
the next-to-lightest supersymmetric particle (NLSP) is long-lived. We consider
an important charged NLSP candidate, the scalar tau Tex. Slow
charged NLSPs may ...
Junji Hisano, Shigeki Matsumoto, Mihoko M. Nojiri, Osamu Saito
Phys.Rev. D71 (2005) 015007      Jul 2004
The neutralino-nucleon (\tilde{\chi}^0-N) scattering is an important process
for direct dark matter searches. In this paper we discuss one-loop
contributions to the cross section in the wino-like and Higgsino-like LSP
cases. The neutralino-nucleon...
SUSY DARK MATTER: A COLLIDER PHYSICIST'S PERSPECTIVE.
Pramana   62:335-346    2004
STUDY OF STOP AND SBOTTOM AT LHC.
Pramana--jounal of physics (Indian Academy of Sciences)   62:659-662    2004
EXPLOSIVE DARK MATTER ANNIHILATION.
Physcal Review Letters   92: 031303    2004
SUSY PARAMETER DETERMINATION IN COMBINED ANALYSES AT LHC / LC.
Journal of High Energy Physics   0402:035    2004
STUDY OF THE SLEPTON NON-UNIVERSALITY AT THE CERN LARGE HADRON COLLIDER.
Physical Review   D70:075016    2004
Physical Review   D70: 115007    2004
Kiyotomo Kawagoe, Tomio Kobayashi, Mihoko M. Nojiri, Atsuhiko Ochi
Phys.Rev. D69 (2004) 035003      Sep 2003
In this paper we study the gauge mediation signal with the ATLAS detector at
the CERN LHC. We focus on the case where the NLSP is the long-lived lightest
neutralino (Tex) which decays dominantly into a photon
(Tex) and a gravit...
Nojiri MIHOKO
Meeting abstracts of the Physical Society of Japan   58(2-1)    Aug 2003
Junji Hisano, Shigeki Matsumoto, Mihoko M. Nojiri
Phys.Rev.Lett.92:031303,2004      Jul 2003
If the Dark Matter (DM) in the Universe has interactions with the
standard-model particle, the pair annihilation may give the imprints in the
cosmic ray. In this paper we study the pair annihilation processes of the DM,
which is neutral, however h...
Mihoko M. Nojiri
Pramana 62:659-662,2004      May 2003
In supersymmetric models a gluino can decay into Tex
through a stop or a sbottom. The decay chain produces an edge structure in the
Tex distribution. Monte Carlo simulation studies show that the end point
and the edge hei...
Mihoko M. Nojiri
Pramana62:335-346,2004      May 2003
A short tour of supersymmetric dark matter and its connection to collider
physics.
Junji Hisano, Kiyotomo Kawagoe, Mihoko M. Nojiri
Phys.Rev.D68:035007,2003      Apr 2003
In supersymmetric models a gluino can decay into tb\tilde{\chi}^{\pm}_1
through a stop or a sbottom. The decay chain produces an edge structure in the
m_{tb} distribution. Monte Carlo simulation studies show that the end point and
the edge height ...
Junji Hisano, Sh. Matsumoto, Mihoko M. Nojiri
Phys.Rev. D67 (2003) 075014      Dec 2002
The neutralino pair annihilation into two photons in our galactic halo gives
a robust dark matter signal, since it would give a quasi-monotonic gamma ray.
This process is radiatively-induced, and the full-one loop calculation was done
previously. ...
Jonathan L. Feng, Mihoko M. Nojiri
   Oct 2002
We present a pedagogical introduction to supersymmetry and supersymmetric
models and give an overview of the potential of the linear collider for
studying them. If supersymmetry is found, its discovery will bring with it many
more questions than a...
Junji Hisano, Kiyotomo Kawagoe, Ryuichiro Kitano, Mihoko M. Nojiri
Phys.Rev. D66 (2002) 115004      Apr 2002
In the minimal supersymmetric standard model (MSSM) properties of the third
generation sfermions are important from the viewpoint of discriminating the
SUSY breaking models and in the determination of the Higgs boson mass. If
gluinos are copiously...
Junji Hisano, Ryuichiro Kitano, Mihoko M. Nojiri
Phys.Rev.D65:116002,2002      Feb 2002
Measurement of Lepton-Flavor Violation (LFV) in the minimal SUSY Standard
Model (MSSM) at Large Hadron Collider (LHC) is studied based on a realistic
simulation. We consider the LFV decay of the second-lightest neutralino,
$\tilde{\chi}^0_2 \to \t...
Yeong Gyun Kim, Mihoko M. Nojiri
Prog.Theor.Phys. 106 (2001) 561-575      Apr 2001
We investigate the implications of the recent measurement of muon anomalous
magnetic moment for the direct detection of neutralino dark matter in the three
different SUSY models: mSUGRA, a model with non-universal Higgs mass, and an
SO(10) GUT mod...
Junji Hisano, Mihoko M. Nojiri, Nobuchika Okada
Phys.Rev. D64 (2001) 023511      Feb 2001
The gauge-mediated SUSY-breaking (GMSB) model needs entropy production at a
relatively low temperature in the thermal history of the Universe for the
unwanted relics to be diluted. This requires a mechanism for the baryogenesis
after the entropy p...
Nojiri Mihoko M.
Soryushiron Kenkyu   102(4) D5-D12   Jan 2001
We show that LHC experiments might well be able to determine all the parameters required for a prediction of the present density of thermal LSP relics from the Big Bang era. If the LSP is an almost pure bino we usually only need to determine its m...
Scrutinizing LSP Dank Matter at the LHC
Physical Reriew   (D63) 035008   2001
Phys. Lett   505(1/4) 169-176   2001
Physical Review   (D64) 023511   2001
Manuel Drees, Yeong Gyun Kim, Tatsuo Kobayashi, Mihoko M. Nojiri
Phys.Rev.D63:115009,2001      Nov 2000
We compare predictions for the spin-independent contribution to the
neutralino-proton scattering cross section Tex and for the anomalous
magnetic dipole moment of the muon, Tex, in models with
gravity-mediated supersymmetry br...
Manuel Drees, Yeong Gyun Kim, Mihoko M. Nojiri, Daisuke Toya, Kazumi Hasuko, Tomio Kobayashi
Phys.Rev.D63:035008,2001      Jul 2000
We show that LHC experiments might well be able to determine all the
parameters required for a prediction of the present density of thermal LSP
relics from the Big Bang era. If the LSP is an almost pure bino we usually only
need to determine its m...
Mihoko M. Nojiri, Daisuke Toya, Tomio Kobayashi
Phys.Rev.D62:075009,2000      Jan 2000
We study the distribution of lepton pairs from the second lightest neutralino
decay \tilde{\chi}^0_2-->\tilde{l}l followed by \tilde{l}\to \tilde{\chi}^0_1
l. The distribution of the ratio of lepton transverse momenta A_T shows peak
structure if m...
Lepton energy asymmetry and precision SUSY study at hadron Collider
Physical Review   (D62) 075009   2000
Mihoko M. Nojiri, Youichi Yamada
Phys.Rev.D60:015006,1999      Jan 1999
We study the distribution of lepton pairs from the second lightest neutralino
decay \tchi^0_2\to\tchi^0_1 l^+l^-. This decay mode is important to measure the
mass difference between \tchi^0_2 and the lightest neutralino \tchi^0_1, which
helps to d...
Lepton flavor violation in the left-handed slepton production at future lepton colliders
Physical Review D   60    1999
Neutralino Decays at the LHC
Phys. Rev D60 : 015006   60    1999
Supersymmetry and Future Collider
Proceeding of KIAS-CTP International Symposium on Supersymmetry, Supergravity and Superstring   204   1999
Junji Hisano, Mihoko M. Nojiri, Yasuhiro Shimizu, Minoru Tanaka
Phys.Rev. D60 (1999) 055008      Aug 1998
The Super-Kamiokande atmospheric neutrino data suggest existence of the large
lepton-flavor violating (LFV) interaction in the higher energy scale. If the
minimal supersymmetric standard model is extended to have right-handed
neutrinos, the left-h...
Nojiri Mihoko. M.
Soryushiron Kenkyu   97(4) D103-D108   Jul 1998
The radiative correction to the supersymmetric relation and their measurement though the study of sneutrino or chargino productions are discussed.
Shingo Kiyoura, Mihoko M. Nojiri, Damien M. Pierce, Youichi Yamada
Phys.Rev. D58 (1998) 075002      Mar 1998
Recently it has been realized that the production and decay processes of
charginos, neutralinos, and sleptons receive corrections which grow like log
m_squark for large m_squark. In this paper we calculate the chargino pair
production cross sectio...
Radiative Corrections to A Supersymmetric Relation : A NEW APPROACH
Physical Review D58   58 075002   1998
Physical Review D   57(3) 1539-1552   1998
Mihoko M. Nojiri
   Aug 1997
In the case with a large splitting between the squark and slepton masses, the
supersymmetric identities which enforce the equality of the gauge and gaugino
couplings are violated in the effective theory below the squark mass threshold.
We compute ...
Mihoko M. Nojiri, Damien M. Pierce, Youichi Yamada
Phys.Rev. D57 (1998) 1539-1552      Jul 1997
We investigate an important radiative correction to the slepton and chargino
production processes. We consider a supersymmetric spectrum with a large
splitting between the squark and slepton masses. In this case, in the effective
theory below the ...
Physical Review D5   56(1) 276-290   1997
Mihoko M. Nojiri, Keisuke Fujii, Toshifumi Tsukamoto
Phys.Rev. D54 (1996) 6756-6776      Jun 1996
Sleptons can easily be found at future linear e+e- colliders if kinematically
accessible. Measurements of their masses and decay distributions would then
determine MSSM parameters. This paper presents a detailed MC study of the
production and deca...
PRECISION STUDY OF MSSM AT FUTURE E<sup>+</sup> E<sup>-</sup> LINEAR COLLIDERS.
Prog. Theor. Phys.   123 203-212   1996
Keisuke Fujii, Mihoko M. Nojiri, Toshifumi Tsukamoto
Prog.Theor.Phys.Suppl. 123 (1996) 203-212      Nov 1995
The lighter scalar tau lepton Tex may be the lightest scalar lepton and
therefore would be found earlier in future collider experiments. We point out
the impact of the measurement of the mass and the mixing angle of Tex to
discriminate the mo...
Mihoko M. Nojiri
   Apr 1995
Study of the production and decay of scalar tau lepton (Tex) at future
Tex colliders helps to determine the value of Tex through the
measurement of the polarization of Tex lepton that arises from Tex decay.
Key maps of the param...
Published in Phys. Rev. D51   51(11) 6281-6291   1995
Mihoko M. Nojiri
Phys.Rev. D51 (1995) 6281-6291      Dec 1994
The Tex lepton arising from the scalar tau (Tex) decay is naturally
polarized. Tex depends on the left--right mixing of the Tex and the
gaugino--higgsino mixing of the neutralino. The polarization Tex could be
measured from the ener...
Francesca M. Borzumati, Manuel Drees, Mihoko M. Nojiri
Phys.Rev. D51 (1995) 341-347      Jun 1994
We point out that combinations of parameters that predict large counting
rates in experiments searching for supersymmetric dark matter often tend to
predict a very large branching ratio for the inclusive decay \bsg. The recent
measurement of this...
Abstracts of the meeting of the Physical Society of Japan. Annual meeting   49(1)    Mar 1994
Phys. Rev. D   50(3 Pt 2) 2148-2163   1994
Phys Rov D   49(9) 4595-4616   1994
Physical Review Letter   72(15) 2324   1994

Books etc

 
Toward Loop Level Study of Supersymmetric Model at Future e<sup>+</sup>e<sup>-</sup> colliders
Beyond The Desert 1997 -Accelerator and Non-Accelerator Approaches   1998   

Research Grants & Projects

 
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2006 - 2009    Investigator(s): Mihoko NOJIRI
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(特定領域研究)
Project Year: 2004 - 2009    Investigator(s): Nojiri MIHOKO
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(C))
Project Year: 2002 - 2005    Investigator(s): Mihoko NOJIRI
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(一般研究(C), 基盤研究(C))
Project Year: 1995 - 1997    Investigator(s): Mihoko NOJIRI
explore the possibility to probe supersymotric model