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  1. Article: Relation between the neutrino and quark mixing angles and grand unification.

    Raidal, Martti

    Physical review letters

    2004  Volume 93, Issue 16, Page(s) 161801

    Abstract: We argue that there exists a simple relation between the quark and lepton mixings, which supports the idea of grand unification and probes the underlying robust bimaximal fermion mixing structure of still unknown flavor physics. In this framework the ... ...

    Abstract We argue that there exists a simple relation between the quark and lepton mixings, which supports the idea of grand unification and probes the underlying robust bimaximal fermion mixing structure of still unknown flavor physics. In this framework the quark mixing matrix is a parameter matrix describing the deviation of neutrino mixing from exactly bimaximal, predicting theta(sol)+theta(C)=pi/4, where theta(C) is the Cabibbo angle, theta(atm)+theta(CKM)(23)=pi/4 and theta(MNS)(13) approximately theta(CKM)(13) approximately O(lambda(3)), in perfect agreement with experimental data. Both non-Abelian and Abelian flavor symmetries are needed for such a prediction to be realistic. An example flavor model capable of explaining this flavor mixing pattern and inducing the measured quark and lepton masses is outlined.
    Language English
    Publishing date 2004-10-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.93.161801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: CP asymmetry in B-->phiK(S) decays in left-right models and its implications for Bs decays.

    Raidal, Martti

    Physical review letters

    2002  Volume 89, Issue 23, Page(s) 231803

    Abstract: In left-right models the gluonic penguin contribution to b-->ss;s transition is enhanced by m(t)/m(b) due to the presence of (V+A) currents and by large values of loop functions. Together those effects may overcome the suppression due to the small left- ... ...

    Abstract In left-right models the gluonic penguin contribution to b-->ss;s transition is enhanced by m(t)/m(b) due to the presence of (V+A) currents and by large values of loop functions. Together those effects may overcome the suppression due to the small left-right mixing angle xi less, similar 0.013. Two independent new phases in the B-->phiK(S) decay amplitude appearing in a large class of left-right models can modify the time-dependent CP asymmetry in this decay mode by O(1) and explain the recent BABAR and Belle CP asymmetry measurements in this channel. This scenario implies observable deviations from the standard model also in B(s) decays which could be measured at Tevatron and LHC.
    Language English
    Publishing date 2002-12-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.89.231803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Neutrino mass, muon anomalous magnetic moment, and lepton flavor nonconservation.

    Ma, E / Raidal, M

    Physical review letters

    2001  Volume 87, Issue 1, Page(s) 11802

    Abstract: If the generating mechanism for neutrino mass is to account for both the newly observed muon anomalous magnetic moment as well as the present experimental bounds on lepton flavor nonconservation, then the neutrino mass matrix should be almost degenerate ... ...

    Abstract If the generating mechanism for neutrino mass is to account for both the newly observed muon anomalous magnetic moment as well as the present experimental bounds on lepton flavor nonconservation, then the neutrino mass matrix should be almost degenerate and the underlying physics should be observable at future colliders. We illustrate this assertion with two specific examples, and show that gamma(mu;-->egamma)/m5(mu), gamma(tau-->egamma)/m5tau, and gamma(tau-->(mu)gamma)/m5tau are in the ratio ((Delta)m2)2sol/2, ((Delta)m2)2sol/2, and ((Delta)m2)2atm, respectively, where the (Delta)m2 parameters are those of solar and atmospheric neutrino oscillations and bimaximal mixing has been assumed.
    Language English
    Publishing date 2001-07-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.87.011802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Electroweak symmetry breaking from the soft portal into dark matter and prediction for direct detection.

    Kadastik, Mario / Kannike, Kristjan / Racioppi, Antonio / Raidal, Martti

    Physical review letters

    2010  Volume 104, Issue 20, Page(s) 201301

    Abstract: Scalar dark matter (DM) can have dimensionful coupling to the Higgs boson-the soft portal into DM-which is predicted to be unsuppressed by the underlying SO(10) grand unified theory (GUT). The dimensionful coupling can be large, μ/v>>1, without spoiling ... ...

    Abstract Scalar dark matter (DM) can have dimensionful coupling to the Higgs boson-the soft portal into DM-which is predicted to be unsuppressed by the underlying SO(10) grand unified theory (GUT). The dimensionful coupling can be large, μ/v>>1, without spoiling the perturbativity of low energy theory up to the GUT scale. We show that the soft portal into DM naturally triggers radiative electroweak symmetry breaking (EWSB) via large 1-loop DM corrections to the effective potential. In this scenario, EWSB, the DM thermal freeze-out cross section, and DM scattering on nuclei are all dominated by the same coupling, predicting the DM mass range to be 700  GeV<M(DM)<2  TeV. The spin-independent direct detection cross section is predicted to be just below the present experimental bounds.<br />
    Language English
    Publishing date 2010-05-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.104.201301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Frame-Independent Classification of Single-Field Inflationary Models.

    Järv, Laur / Kannike, Kristjan / Marzola, Luca / Racioppi, Antonio / Raidal, Martti / Rünkla, Mihkel / Saal, Margus / Veermäe, Hardi

    Physical review letters

    2017  Volume 118, Issue 15, Page(s) 151302

    Abstract: Seemingly unrelated models of inflation that originate from different physical setups yield, in some cases, identical predictions for the currently constrained inflationary observables. In order to classify the available models, we propose to express the ...

    Abstract Seemingly unrelated models of inflation that originate from different physical setups yield, in some cases, identical predictions for the currently constrained inflationary observables. In order to classify the available models, we propose to express the slow-roll parameters and the relevant observables in terms of frame and reparametrization invariant quantities. The adopted invariant formalism makes manifest the redundancy that afflicts the current description of inflation dynamics and offers a straightforward way to identify classes of models which yield identical phenomenology. In this Letter, we offer a step-to-step recipe to recast every single field inflationary model in the proposed formalism, detailing also the procedure to compute inflationary observables in terms of frame and reparametrization invariant quantities. We hope that our results become the cornerstone of a new categorization of viable inflationary models and open the way to a deeper understanding of the inflation mechanism.
    Language English
    Publishing date 2017-04-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.118.151302
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book: Lepton number and lepton flavour violation in left-right symmetric models

    Raidal, Martti

    (DESY / Deutsches Elektronen-Synchrotron ; 98-126)

    1998  

    Author's details Martti Raidal
    Series title DESY / Deutsches Elektronen-Synchrotron ; 98-126
    Language English
    Size 25 Sp, graph. Darst
    Publisher DESY
    Publishing place Hamburg
    Document type Book
    Note Auch als elektronisches Dokument vorh. ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Dokumentversion können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  7. Book ; Thesis: Extended electroweak models and their tests in future colliders

    Raidal, Martti

    (Report series / Research Institute for High Energy Physics ; 1995,10)

    1995  

    Author's details Martti Raidal
    Series title Report series / Research Institute for High Energy Physics ; 1995,10
    Language English
    Size 43 S
    Publisher Univ. Press
    Publishing place Helsinki
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Helsinki, 1995
    ISBN 9514570804 ; 9789514570803
    Database Former special subject collection: coastal and deep sea fishing

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  8. Book ; Online: Doubly charged higgsino pair production and decays in e+e ̄collisions

    Raidal, M / Zerwas, P. M

    (DESY ; 98-136)

    1999  

    Author's details M. Raidal; P. M. Zerwas
    Series title DESY ; 98-136
    Language English
    Size Online-Ressource
    Edition [Electronic ed.]
    Publisher Universitätsbibliothek u. Technische Informationsbibliothek ; DESY
    Publishing place Hannover ; Hamburg
    Document type Book ; Online
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  9. Article ; Online: Verifiable model of neutrino masses from large extra dimensions

    Ma / Raidal / Sarkar

    Physical review letters

    2000  Volume 85, Issue 18, Page(s) 3769–3772

    Abstract: We propose a new scenario of neutrino masses with a Higgs triplet (xi(++),xi(+),xi(0)) in a theory of large extra dimensions. Lepton number violation in a distant brane acts as the source of a very small trilinear coupling of xi to the standard Higgs ... ...

    Abstract We propose a new scenario of neutrino masses with a Higgs triplet (xi(++),xi(+),xi(0)) in a theory of large extra dimensions. Lepton number violation in a distant brane acts as the source of a very small trilinear coupling of xi to the standard Higgs doublet in our brane. Small realistic Majorana neutrino masses are naturally obtained with the fundamental scale M(*) approximately O(1) TeV, foretelling the possible discovery of xi (m(xi) less, similarM(*)) at future colliders. Decays of xi(++) into same-sign dileptons are fixed by the neutrino mass matrix. Observation of μ-e conversion in nuclei is predicted.
    Language English
    Publishing date 2000-10-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.85.3769
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Book: Doubly charged Higgsino pair production and decays in e+e- collisions

    Raidal, Martti / Zerwas, Peter M

    (DESY / Deutsches Elektronen-Synchrotron ; 98-136)

    1998  

    Author's details M. Raidal, P. M. Zerwas. Deutsches Elektronen-Synchrotron, DESY
    Series title DESY / Deutsches Elektronen-Synchrotron ; 98-136
    Language English
    Size 25 Sp, graph. Darst, 30 cm
    Publisher DESY
    Publishing place Hamburg
    Document type Book
    Note Auch als elektronisches Dokument vorh. ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Dokumentversion können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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