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Komine, Yumiko; Komine, Ken-ichi; KAI, Kenzo; Itagaki, Masashi; UEMATSU, Masami; KIFUNE, Atsutaka; KOBAYASHI, Jin; Yamaguchi, Takahiro; Kumagai, Katsuo

doi:10.2508/chikusan.75.205

Cited by 6 publications

(7 citation statements)

References 22 publications

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“…While this paper was under preparation the work of Ref. [41] appeared where the issue of b − τ unification with gaugino mass nonuniversality was also briefly discussed.…”

Section: Discussionmentioning

confidence: 99%

b−τunification,gμ−2,the
Chattopadhyay
¹
,
Nath
²

2002
Phys. Rev. D
104
11
108
0
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An analysis is given of the b-Yukawa coupling unification in view of the recent result from Brookhaven on g Ϫ2 and under the constraint of b→sϩ␥. We explore b-unification under the above constraints for nonuniversal boundary conditions for soft supersymmetry breaking parameters. We find new regions of the parameter space where a significant negative supersymmetric contribution to the b quark mass can arise and b-unification within SU͑5͒ framework can occur with nonuniversal gaugino masses. Specifically, we find that for the case where the gaugino mass matrix transforms like a 24-plet one finds a negative contribution to the b quark mass irrespective of the sign of the Higgs mixing parameter when the supersymmetric contribution to g Ϫ2 is positive. We exhibit regions of the parameter space where b-unification occurs for Ͼ0 satisfying the constraints of b→sϩ␥ and g Ϫ2. The Ͻ0 case is also explored. The dependence of the accuracy of b-unification defined by ͉ b Ϫ ͉/ on the parameter space is also investigated and it is shown that unification with an accuracy of a few percent can be achieved in significant regions of the parameter space. The allowed parameter space is consistent with the naturalness constraints and the corresponding sparticle spectrum is accessible at the CERN Large Hadron Collider.

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“…While this paper was under preparation the work of Ref. [41] appeared where the issue of b − τ unification with gaugino mass nonuniversality was also briefly discussed.…”

Section: Discussionmentioning

confidence: 99%

b−τunification,gμ−2,the
Chattopadhyay
¹
,
Nath
²

2002
Phys. Rev. D
104
11
108
0
View full text Add to dashboard Cite

show abstract

“…( 5) one finds that the dominant gluino exchange contribution to ∆ b is positive for a positive µ which is not what is preferred by the b − τ unification constraint. How to reconcile the positivity of µ with the Yukawa unification has been discussed in several recent works [45,46,47,48]. We discuss here in some detail the scenarios where such a phenomenon arises naturally from gaugino mass nonuniversality.…”

Section: B − τ Unification and µ Signmentioning

confidence: 91%

Status of Supersymmetry in the Light of Recent Experiments

Chattopadhyay

Corsetti

Nath

2002

Dark Matter in Astro- And Particle Physics

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In this talk we discuss the constraints on supersymmetry arising from data from a number of recent experiments. There appears to be good cumulative evidence from experiment in favor of positivity of the sign of the Higgs mixing parameter µ. Implications of this result for Yukawa unification are discussed since Yukawa unification is sensitive to the µ sign. An analysis of dark matter under the constraints of Yukawa unification is also given. It is shown that the simultaneous imposition of all existing constraints sharply defines the parameter space of models. Specifically models with nonuniversality of gaugino masses provide a simple resolution to the positivity of the µ parameter and Yukawa unification. Implications of these results for colliders and for the next generation of dark matter searches are also discussed.

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“…Generally the gluino exchange contribution tends to be the larger one and here one finds that for a positive M g which is typically the case a negative µ indeed leads to a negative correction to the b quark mass which in turn leads to the usual result that b − τ unification prefers a negative µ. There are several solutions discussed recently to overcome this problem [32,33,34,35]. One simple possibility discussed in Refs.…”

Section: Implications Of Datamentioning

confidence: 89%

“…One simple possibility discussed in Refs. [34,35] is that of nonuniversal gaugino masses where the sign of the gluino mass is negative relative to the mass of the SU(2) gaugino mass. In this case one can obtain a negative contribution to the b quark mass while maintaining a positive µ.…”

Section: Implications Of Datamentioning

confidence: 99%

Theoretical Status of Muon (g−2)

Chattopadhyay¹,

Corsetti²,

Nath³

2002

AIP Conference Proceedings

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The theoretical status of the muon anomaly is reviewed including the recent change in the light by light hadronic correction. Specific attention is given to the implications of the shift in the difference between the BNL experimental result and the standard model prediction for sparticle mass limits. The implication of the BNL data for Yukawa unification is discussed and the role of gaugino mass nonuniversalities in the satisfaction of Yukawa unification is explored. An analysis of the BNL constraint for the satisfaction of the relic density constraint and for the search for dark matter is also given.

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Untitled

Cited by 6 publications

References 22 publications

b−τunification,gμ−2,the
Chattopadhyay
¹
,
Nath
²

2002
Phys. Rev. D
104
11
108
0
View full text Add to dashboard Cite

b−τunification,gμ−2,the
Chattopadhyay
¹
,
Nath
²

2002
Phys. Rev. D
104
11
108
0
View full text Add to dashboard Cite

Status of Supersymmetry in the Light of Recent Experiments

Theoretical Status of Muon (g−2)

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Untitled

Cited by 6 publications

References 22 publications

b−τunification,gμ−2,theChattopadhyay1, Nath2 2002Phys. Rev. D104111080View full textAdd to dashboardCite

b−τunification,gμ−2,theChattopadhyay1, Nath2 2002Phys. Rev. D104111080View full textAdd to dashboardCite

Status of Supersymmetry in the Light of Recent Experiments

Theoretical Status of Muon (g−2)

Contact Info

Product

Resources

About

b−τunification,gμ−2,the
Chattopadhyay
¹
,
Nath
²

2002
Phys. Rev. D
104
11
108
0
View full text Add to dashboard Cite

b−τunification,gμ−2,the
Chattopadhyay
¹
,
Nath
²

2002
Phys. Rev. D
104
11
108
0
View full text Add to dashboard Cite