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Paper: hep-ph/9701294
From: Aneesh Manohar <man...@wigner.ucsd.edu>
Date: Tue, 14 Jan 1997 18:31:47 -0800
Title: The HQET/NRQCD Lagrangian to order alpha/m^3
Authors: Aneesh Manohar
Comments: 18 pages, uses revtex
Report-no: UCSD/PTH 97-01
\\
The HQET/NRQCD Lagrangian is computed to order alpha/m^3. The computation is
performed using dimensional regularization to regulate the ultraviolet and
infrared divergences. The results are consistent with reparametrization
invariance to order 1/m^3. Some subtleties in the matching conditions for NRQCD
are discussed.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701294 , 23kb)
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Paper: hep-ph/9701295
From: gk...@phy.sejong.ac.kr (Kim Gwang-Hee)
Date: Wed, 15 Jan 1997 12:24:01 +0900 (KST)
Title: Solving the Puzzle of ${M_{D^*}-M_{D}\over M_{D_s^*}-M_{D_s}}$ $\simeq$
${M_{B^*}-M_{B}\over M_{B_s^*}-M_{B_s}}$ $\simeq$ $1$
Authors: Dae Sung Hwang and Gwang-Hee Kim
Comments: 10 pages, Latex, 5 figures
\\
The commonly used Hamiltonian of the chromomagnetic hyperfine splitting is
inversely proportional to the product of the masses of two constituent quarks
composing the meson. So it is expected to have
$(M_{D^*}-M_{D})/(M_{D_s^*}-M_{D_s})$ $\simeq$
$(M_{B^*}-M_{B})/(M_{B_s^*}-M_{B_s})$ $\simeq$ $1.6$, when the constituent
quark masses $m_{u,d}=0.33$ GeV and $m_s=0.53$ GeV are used. However, the
experimental results show that the above ratios are very close to 1. We solve
this puzzle by employing the Hamiltonian recently proposed by Scora and Isgur.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701295 , 15kb)
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Paper: hep-ph/9701296
From: "u.meissner" <kph...@ikp187.ikp.kfa-juelich.de>
Date: Wed, 15 Jan 1997 09:50:00 +0100
Title: Strange vector currents and the OZI-rule
Authors: Ulf-G. Mei{\ss}ner, V. Mull, J. Speth, J. W. van Orden
Comments: 8 pp, plain LaTeX, uses epsf, 3 figures
Report-no: KFA-IKP(TH)-1997-01
\\
We investigate the role of correlated $\pi\rho$ exchange in the extraction of
matrix elements of the strange vector current in the proton. We show that a
realistic isoscalar spectral function including this effect leads to sizeably
reduced strange vector form factors based on the dispersion--theoretical
analysis of the nucleons' electromagnetic form factors.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701296 , 14kb)
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Paper: hep-ph/9701297
From: dkuz...@vitep5.itep.ru
Date: Wed, 15 Jan 1997 14:42:57 EET
Title: Effective Quark Lagrangian in the Instanton Vacuum with Nonzero Modes
Included
Authors: B.O.Kerbikov, D.S.Kuzmenko, Yu.A.Simonov
Comments: 5 pages
Journal-ref: Pis'ma v ZhETF 65 128(97)
\\
A new approach to effective theory of quarks in the instanton vacuum is
presented. Exact equations for the quark propagator and Lagrangian are derived
which contain contributions of all quark modes with known coefficients. The
resulting effective Lagrangian differs from the standard one and resembles that
of the Nambu--Jona--Lasinio model.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701297 , 6kb)
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Paper: hep-ph/9701298
From: "Carlo Giunti +39-11-6707235 Fax:6699579" <GIU...@to.infn.it>
Date: Wed, 15 Jan 1997 16:52:00 +0100 (MET)
Title: Constraints on neutrinoless double beta decay from neutrino oscillation
experiments
Authors: S.M. Bilenky, C. Giunti and M. Monteno
Comments: Latex2e file, 15 pages including 3 figures. The postscript file is
available at http://www.to.infn.it/teorici/giunti/papers.html
Report-no: DFTT 3/97
\\
We show that, in the framework of a general model with mixing of three
Majorana neutrinos and a neutrino mass hierarchy, the results of the Bugey and
Krasnoyarsk reactor neutrino oscillation experiments imply strong limitations
for the effective Majorana mass |<m>| that characterizes the amplitude of
neutrinoless double beta decay. We obtain further limitations on |<m>| from the
data of the atmospheric neutrino experiments. We discuss the possible
implications of the results of the future long baseline neutrino oscillation
experiments for neutrinoless double beta decay.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701298 , 63kb)
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Paper: hep-ph/9701299
From: posp...@mercure.phy.uqam.ca
Date: Wed, 15 Jan 97 12:47:41 -0500
Title: $\mu\to e\gamma$ Decay in the Left-Right Supersymmetric Model
Authors: G. Couture, M. Frank, H. Konig and M. Pospelov
Comments: 10 pages, LaTeX, 1 figure
Report-no: UQAM-PHE-96/10, CUMQ/HEP 94
\\
We calculate the rate of the decay $\mu\rightarrow e\gamma$ and the el ectric
dipole moment of the electron in the left-right supersymmetric model when the
breaking of parity occurs at a considerably large scale. The low-energy flavor
violation in the model originates either from the nonvanishing remnants of the
left-right symmetry in the slepton mass matrix or from the direct flavor
changing lepton-slepton-neutralino interaction. The result is found to be large
for the masses of the supersymmetric particles not far from the electroweak
scale and already accessible at the current experimental accuracy. It also
provides nontrivial constraints of the lepton mixing in the model.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701299 , 11kb)
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Paper: hep-ph/9701300
From: ka...@physics.uc.edu (Alex Kagan)
Date: Wed, 15 Jan 1997 16:44:03 -0300
Title: Hints for Enhanced b -> sg from Charm and Kaon Counting
Authors: Alexander L. Kagan (ka...@physunc.phy.uc.edu), Johan Rathsman
(rath...@slac.stanford.edu)
Comments: 23 pages, Latex, 1 figure, 6 tables
\\
Previously, motivation for enhanced b -> sg from new flavor physics has
centered on discrepancies between theory and experiment. Here two experimental
hints are considered: (1) updated measurements of the charm multiplicity and
BR(Bbar -> X_{ccbars}) at the Upsilon (4S) imply BR(B -> Xnocharm}) \approx
12.4 \pm 5.6 %, (2) the Bbar} -> K- X and Bbar -> K+/K- X branching fractions
are in excess of conventional Bbar -> Xc -> KX yields by about 16.9 \pm 5.6 %
and 18 \pm 5.3 %, respectively. JETSET 7.4 was used to estimate kaon yields
from ssbar popping in Bbar -> Xcubard decays. JETSET 7.4 Monte Carlos for
BR(Bbar -> Xsg) \sim 15 % imply that the additional kaon production would lead
to 1 \sigma agreement with observed charged and neutral kaon yields. The Ks
momentum spectrum would be consistent with recent CLEO bounds in the end point
region. Search strategies for enhanced b -> sg are discussed in light of large
theoretical uncertainty in the standard model fast kaon background from b -> s
penguin operators.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701300 , 29kb)
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Paper: hep-ph/9701301
From: NA...@hex.neu.edu
Date: Wed, 15 Jan 1997 19:49:32 -0400 (EDT)
Title: Non-Universal Soft SUSY Breaking and Dark Matter
Authors: Pran Nath and R. Arnowitt
Comments: 28 pages, latex, and 7 figs
Report-no: NUB-TH-3151/97; CTP-TAMU-03/97
\\
An analysis is given of the effects of non-universal soft SUSY breaking
masses in the Higgs sector and in the third generation squark sector, and it is
shown that they are highly coupled. Analytic expressions are obtained for their
effects on the parameters $\mu,m_A$ and on the third generation squark masses.
Non-universality effects on dark matter event rates in neutralino-nucleus
scattering are analysed. It is found that the effects are maximal in the range
$m_{\tilde\chi_1}\leq 65$~GeV where the relic density is governed by the Z and
Higgs poles. In this range the minimum event rates can be increased or
decreased by factors of O(10) depending on the sign of non-universality. Above
this range Landau pole effects arising from the heavy top mass tend to suppress
the non-universality effects. The effect of more precise measurements of
cosmological parameters on event rates, which is expected to occur in the next
round of COBE like sattelite experiments, is also investigated. Implications
for the analysis for dark matter searches are discussed.
\\ (http://xxx.lanl.gov/abs/hep-ph/9701301 , 94kb)
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Paper (*cross-listing*): hep-th/9701057
From: Zurab Kakushadze <zu...@string.harvard.edu>
Date: Mon, 13 Jan 97 23:06:34 -0400
Title: A Classification of 3-Family Grand Unification in String Theory II. The
SU(5) and SU(6) Models
Authors: Zurab Kakushadze and S.-H. Henry Tye
Comments: 11 pages, Revtex 3.0, one ps figure
Report-no: Cornell preprint CLNS 96/1458, Harvard preprint HUTP-96/A056,
Northeastern preprint NUB 3150
\\
Requiring that supersymmetric SU(5) and SU(6) grand unifications in the
heterotic string theory must have 3 chiral families, adjoint (or higher
representation) Higgs fields in the grand unifiedgauge group, and a non-abelian
hidden sector, we construct such string models within the framework of
conformal field theory and asymmetric orbifolds. Within this framework, we
construct all such string models via Z_6 asymmetric orbifolds that include a
Z_3 outer-automorphism, the latter yielding a level-3 current algebra for the
grand unification gauge group SU(5) or SU(6). We then classify all such Z_6
asymmetric orbifolds that result in models with a non-abelian hidden sector.
All models classified in this paper have only one adjoint (but no otherhigher
representation) Higgs field in the grand unified gauge group. This Higgs field
is neutral under all other gauge symmetries. The list of hidden sectors for
3-family SU(6) string models are SU(2), SU(3) and $SU(2) \otimes SU(2)$. In
addition to these, 3-family SU(5) string models can also have an SU(4) hidden
sector. Some of the models have an anomalous U(1).
\\ (http://xxx.lanl.gov/abs/hep-th/9701057 , 25kb)
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Paper (*cross-listing*): hep-th/9701063
From: tan...@tuhep.phys.tohoku.ac.jp
Date: Tue, 14 Jan 97 21:43:51 +0900
Title: SUSY and Flat Direction in de Sitter Space
Author: M. Tanaka
Comments: 32 pages, Latex, 14 figures
Report-no: TU/97/516
\\
We have found that supersymmetry (SUSY) in curved space is broken softly. It
is also found that Pauli-Villars regularization preserves the remaining
symmetry, softly broken SUSY. Using it we computed the one-loop effective
potential along a (classical) flat direction in a Wess-Zumino model in de
Sitter space. The analysis is relevant to the Affleck-Dine mechanism for
baryogenesis. The effective potential is unbounded from below:
$V_{eff}(\phi)\to -3g^2H^2\phi ^2 ln \phi ^2 /16\pi ^2$, where $\phi$ is the
scalar field along the flat direction, g is a typical coupling constant, and H
is the Hubble parameter. This is identical with the effective potential which
is obtained by using proper-time cutoff regularization. Since proper-time
cutoff regularization is exact even at the large curvature region, the
effective potential possesses softly broken SUSY and reliability in the large
curvature region.
\\ (http://xxx.lanl.gov/abs/hep-th/9701063 , 58kb)
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Paper (*cross-listing*): hep-th/9701067
From: Recai Erdem <er...@sardes.iyte.edu.tr>
Date: Tue, 14 Jan 1997 18:17:02 +0300 (MEST)
Date (revised): Wed, 15 Jan 1997 12:08:11 +0300 (MEST)
Title: Higgs field as the gauge field corresponding to parity in the usual
space-time
Authors: Recai Erdem
Comments: 14 pages, latex, no figures
\\
We find that the local character of field theory requires the parity degree
of freedom of the fields to be considered as an additional dicrete fifth
dimension which is an artifact emerging due to the local description of
space-time. Higgs field arises as the gauge field corresponding to this
discrete dimension. Hence the noncommutative geometric derivation of the
standard model follows as a manifestation of the local description of the usual
space-time.
\\ (http://xxx.lanl.gov/abs/hep-th/9701067 , 7kb)
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Paper: hep-ph/9407339
replaced with revised version Wed, 15 Jan 1997 12:04:28 -0600 (CST)
Title: Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy
Quarkonium
Authors: Geoffrey T. Bodwin, Eric Braaten, and G. Peter Lepage
Comments: Revised to clarify the velocity-scaling rules for spin-flip
transitions, to correct error estimates, and to emphasize probabilities of
Fock states, rather than amplitudes, 117 pages in REVTEX plus 11 Postscript
figures. Erratum to Phys. Rev. D article included as a separate file, 4 pages
in REVTEX
Report-no: ANL-HEP-PR-94-24
Journal-ref: Phys. Rev. D51, (1995) 1125
\\ (http://xxx.lanl.gov/abs/hep-ph/9407339 , 234kb)
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Paper: hep-ph/9602251
replaced with revised version Wed, 15 Jan 97 17:14:38 CST
Title: SU(3) breaking and baryon magnetic moments
Authors: J.W. Bos, D. Chang, S.C. Lee, Y.C. Lin, H.H. Shih
Comments: 7 pages of Latex, no figures, version to be published in Chin. J.
Phys. (Taipei) (1997)
\\ (http://xxx.lanl.gov/abs/hep-ph/9602251 , 8kb)
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Paper: hep-ph/9612493
replaced with revised version Wed, 15 Jan 97 17:18:12 JST
Title: Predictions of $m_b/m_{\tau}$ and $m_t$ in an Asymptotically Non-Free
Theory
Authors: Masako Bando, Tetsuya Onogi, Joe Sato, Tatsu Takeuchi
Comments: 20 pgs. 7 figures. Latex2e. othersym.sty, suceqn.sty included
\\ (http://xxx.lanl.gov/abs/hep-ph/9612493 , 126kb)
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