Summary
The concept of the presented scenarios is the following. The signature in
question is the decay of a heavy Higgs scalar
(or a heavy
pseudoscalar
) into a SM-like Higgs boson
and another
singlet-like Higgs
(or
):
and:
A summary of benchmark lines is visualized here:
for
decays into
and
final states, and
for
decays into the
final state.
The lines denote the maximum cross section times branching ratio that the
NMSSM scans gave.
The lines in root format are available here:
HXSG_NMSSM_recommendations_00.root
Short description
The lines correspond to the maximum cross-section times branching ratio
allowed in the (real) NMSSM after experimental constraints from Higgs
boson measurements, searches for supersymmetry, B-meson physics and dark
matter detection as implemented in the used codes NMSSMTools 5.5.0 [1] and
NMSSMCALC [2].
[1] U.~Ellwanger, J.~F.~Gunion and C.~Hugonie, JHEP {\bf 0502} (2005) 066,
[hep-ph/0406215], and
U.~Ellwanger and C.~Hugonie, Comput.\ Phys.\ Commun.\ {\bf 175} (2006)
290 [hep-ph/0508022].
(
https://www.lupm.univ-montp2.fr/users/nmssm/codes.html)
[2] J.~Baglio, R.~Gröber, M.~Mühlleitner, D.~T.~Nhung, H.~Rzehak,
M.~Spira, J.~Streicher and K.~Walz, Comput.\ Phys.\ Commun.\ {\bf 185}
(2014) no.12, 3372, [arXiv:1312.4788 [hep-ph]].
(
https://www.itp.kit.edu/~maggie/NMSSMCALC/)
Long description
The masses of the NMSSM-specific mostly singlet-like scalar and
pseudoscalar bosons
and
(which are NOT degenerate) are not
constrained by present searches for
BSM Higgs bosons if their couplings
to SM particles are very small, which is the case in most regions of the
NMSSM parameter space. Then their direct production cross sections are
very small as well.
However, they can be produced in decays of mostly MSSM-like scalar or
pseudoscalar bosons
and
which exist in the NMSSM as well.
The branching fractions for
and
can
be large, even dominant, even for pure singlet-like
and
. In this
case the constraints from searches for
and
in other final
states like tautau or bb would be considerably alleviated.
This motivates the search for resonant pair production of
and
. A difficulty is that both processes involve two unknown
masses
and
, respectively, but the final states are
not very different from those in H_125 pair production.
Benchmark points for these processes including production cross sections
times branching fractions (Xsect*BR) have been presented previously in
1408.1120, 1707.08522, 1901.02332 and on the twiki page
NMSSMBenchmarkPoints for various choices of the involved masses and
final states. Promising final states are
,
or
, and
(from
) +
(from
).
In the figures below we show maximally possible Xsect*BRs in the NMSSM
parameter space consistent with
a) constraints on
rates and searches for
BSM Higgs bosons
(from
HiggsBounds/HiggsSignals)
b) constraints from dark matter direct detection (asking for a relic
density equal to or below the WMAP bound)
c) constraints from sparticle searches, B-physics and LEP.
These maximally possible Xsect*BRs have been obtained by the codes
NMSSMTools_5.5.0 and NMSSMCALC. Due to the different implementation of
radiative corrections the maximally possible Xsect*BRs differ somewhat
by up to ~13% which we consider as a theoretical uncertainty.
It turns out that the maximally possible Xsect*BRs for
or
are always ~10% of the maximally possible Xsect*BRs for
. The maximally possible Xsect*BRs for
can be relatively large since the BR(
) can be up to ~90%.
Of course, both sets of maximally possible Xsect*BRs decrease with the masses of
and
as shown in the figures. (The combination of the above
constraints imply lower limits on the masses of
and
which
are stronger than those from direct searches for
and
.) On
the other hand the maximally possible Xsect*BRs depend little on the
masses of
and
, so we concentrate on
~100-110
GeV and
~100-103
GeV, motivated by possible excesses in searches for
BSM
Higgs bosons in this mass range. But we underline that searches should not be
confined to the shown mass values. An additional info is that the widths
of the heavy resonances vary from ~2
GeV up to ~14
GeV for masses up to
1
TeV.
More Benchmark points
for
(Status 2020, produced 2/2022 using NMSSMTools)
410 |
90 |
0.141E-2 |
409 |
100 |
0.155E-2 |
400 |
150 |
0.923E-3 |
400 |
200 |
0.109E-2 |
400 |
250 |
0.141E-4 |
500 |
90 |
0.522E-3 |
500 |
100 |
0.527E-3 |
500 |
150 |
0.472E-3 |
500 |
200 |
0.386E-3 |
500 |
250 |
0.329E-3 |
500 |
300 |
0.253E-3 |
600 |
90 |
0.193E-3 |
600 |
100 |
0.194E-3 |
600 |
150 |
0.190E-3 |
600 |
200 |
0.182E-3 |
600 |
250 |
0.722E-4 |
600 |
300 |
0.142E-3 |
600 |
400 |
0.103E-4 |
700 |
90 |
0.800E-4 |
700 |
100 |
0.802E-4 |
700 |
150 |
0.772E-4 |
700 |
200 |
0.795E-4 |
700 |
250 |
0.758E-4 |
700 |
300 |
0.502E-4 |
700 |
400 |
0.129E-4 |
700 |
500 |
0.197E-5 |
800 |
90 |
0.345E-4 |
800 |
100 |
0.349E-4 |
800 |
150 |
0.354E-4 |
800 |
200 |
0.347E-4 |
800 |
250 |
0.236E-4 |
800 |
300 |
0.212E-4 |
800 |
400 |
0.635E-5 |
800 |
500 |
0.229E-5 |
800 |
600 |
0.463E-6 |
900 |
90 |
0.162E-4 |
900 |
100 |
0.160E-4 |
900 |
150 |
0.153E-4 |
900 |
200 |
0.154E-4 |
900 |
250 |
0.130E-4 |
900 |
300 |
0.126E-4 |
900 |
400 |
0.216E-5 |
900 |
500 |
0.117E-5 |
900 |
600 |
0.629E-6 |
900 |
700 |
0.311E-7 |
1000 |
90 |
0.749E-5 |
1000 |
100 |
0.742E-5 |
1000 |
150 |
0.756E-5 |
1000 |
200 |
0.788E-5 |
1000 |
250 |
0.559E-5 |
1000 |
300 |
0.507E-5 |
1000 |
400 |
0.125E-5 |
1000 |
500 |
0.615E-06 |
1000 |
600 |
0.471E-06 |
1000 |
700 |
0.220E-06 |
1000 |
800 |
0.236E-07 |
--
RompotisNikolaos - 2020-03-16