The study of the properties of the extended Higgs boson sector within hMSSM model
Using the latest experimental data, performed by ATLAS Collaboration and within the framework of the Minimal Supersymmetric Standard Model, we presented the calculations for cross sections times branching fractions, σ × Br, as a functions of the CP-even, H, Higgs boson mass, CP-odd, A, Higgs boson m...
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irk-123456789-1951352023-12-03T16:00:22Z The study of the properties of the extended Higgs boson sector within hMSSM model Obikhod, T.V. Petrenko, E.A. Nuclear physics and elementary particles Using the latest experimental data, performed by ATLAS Collaboration and within the framework of the Minimal Supersymmetric Standard Model, we presented the calculations for cross sections times branching fractions, σ × Br, as a functions of the CP-even, H, Higgs boson mass, CP-odd, A, Higgs boson mass and charged, H±, Higgs boson mass. Using the restricted parameter set, received from the hMSSM+HDECAY and ”low-tb-high” scenarios, with the help of the computer programs SOFTSUSY, Prospino and SusHi, we received the large values of σ × Br for A and H bosons at tanβ=2 for the planned 14 TeV at the LHC and found the large σ × Br at tanβ=30 for charged Higgs boson. The obtained results are of experimental interest as they are connected with the experimental searches for new physics beyond the Standard Model at the LHC. Використовуючи останні експериментальні дані, отримані ATLAS колаборацією, у рамках Мінімальної суперсиметричної стандартної моделі, ми представили розрахунки по перерізам утворення, помноженим на ширини розпадів, σ × Br, як функції маси СР-парного, H, бозона Хіггса, СР-непарного, A, бозона Хіггса і зарядженого, H±, бозона Хіггса. Використання обмеженого набору параметрів, отриманих з hMSSM + HDECAY і «low-tb-high» сценаріїв, за допомогою комп'ютерних програм SOFTSUSY, Prospino і SusHi, дало можливість отримати великі значення σ × Br задля А і Н бозонів при tanβ=2 для запланованих 14 ТеВ на LHC і велике значення σ × Br при tanβ=30 для зарядженого бозона Хіггса. Отримані результати є важливими для експеримента, оскільки вони пов'язані із експериментальними пошуками нової фізики за межами Стандартної моделі на LHC. Используя последние экспериментальные данные, полученные ATLAS коллаборацией, в рамках Минимальной суперсимметричной стандартной модели, мы представили расчеты по сечениям, умноженным на ширины распадов,σ × Br, как функции массы СР-четного, H, бозона Хиггса, СР-нечетного, A, бозона Хиггса и заряженного,H±, бозона Хиггса. Использование ограниченного набора параметров, полученных из hMSSM + HDECAY и «low-tb-high» сценариев, с помощью компьютерных программ SOFTSUSY, Prospino и SusHi, дало возможность получить большие значения σ × Br для А и Н бозонов при tanβ=2 для запланированных 14 ТэВ на LHC и большое значение σ × Br при tanβ=30 для заряженного бозона Хиггса. Полученные результаты представляют собой интерес для эксперимента, поскольку они связаны с экспериментальными поисками новой физики за пределами Стандартной модели на LHC. 2019 Article The study of the properties of the extended Higgs boson sector within hMSSM model / T.V. Obikhod, E.A. Petrenko // Problems of atomic science and technology. — 2019. — № 3. — С. 3-10. — Бібліогр.: 21 назв. — англ. 1562-6016 PACS: 11.25.-w, 12.60.Jv, 02.10.Ws http://dspace.nbuv.gov.ua/handle/123456789/195135 en Вопросы атомной науки и техники Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Nuclear physics and elementary particles Nuclear physics and elementary particles Obikhod, T.V. Petrenko, E.A. The study of the properties of the extended Higgs boson sector within hMSSM model Вопросы атомной науки и техники |
| description |
Using the latest experimental data, performed by ATLAS Collaboration and within the framework of the Minimal Supersymmetric Standard Model, we presented the calculations for cross sections times branching fractions, σ × Br, as a functions of the CP-even, H, Higgs boson mass, CP-odd, A, Higgs boson mass and charged, H±, Higgs boson mass. Using the restricted parameter set, received from the hMSSM+HDECAY and ”low-tb-high” scenarios, with the help of the computer programs SOFTSUSY, Prospino and SusHi, we received the large values of σ × Br for A and H bosons at tanβ=2 for the planned 14 TeV at the LHC and found the large σ × Br at tanβ=30 for charged Higgs boson. The obtained results are of experimental interest as they are connected with the experimental searches for new physics beyond the Standard Model at the LHC. |
| format |
Article |
| author |
Obikhod, T.V. Petrenko, E.A. |
| author_facet |
Obikhod, T.V. Petrenko, E.A. |
| author_sort |
Obikhod, T.V. |
| title |
The study of the properties of the extended Higgs boson sector within hMSSM model |
| title_short |
The study of the properties of the extended Higgs boson sector within hMSSM model |
| title_full |
The study of the properties of the extended Higgs boson sector within hMSSM model |
| title_fullStr |
The study of the properties of the extended Higgs boson sector within hMSSM model |
| title_full_unstemmed |
The study of the properties of the extended Higgs boson sector within hMSSM model |
| title_sort |
study of the properties of the extended higgs boson sector within hmssm model |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Nuclear physics and elementary particles |
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http://dspace.nbuv.gov.ua/handle/123456789/195135 |
| citation_txt |
The study of the properties of the extended Higgs boson sector within hMSSM model / T.V. Obikhod, E.A. Petrenko // Problems of atomic science and technology. — 2019. — № 3. — С. 3-10. — Бібліогр.: 21 назв. — англ. |
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Вопросы атомной науки и техники |
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| fulltext |
NUCLEAR PHYSICS AND ELEMENTARY PARTICLES
THE STUDY OF THE PROPERTIES OF THE EXTENDED
HIGGS BOSON SECTOR WITHIN hMSSM MODEL
T.V.Obikhod ∗, E.A.Petrenko
Institute for Nuclear Research National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
(Received January 29, 2018)
Using the latest experimental data, performed by ATLAS Collaboration and within the framework of the Minimal
Supersymmetric Standard Model, we presented the calculations for cross sections times branching fractions, σ×Br,
as a functions of the CP-even, H, Higgs boson mass, CP-odd, A, Higgs boson mass and charged, H±, Higgs boson
mass. Using the restricted parameter set, received from the hMSSM+HDECAY and ”low-tb-high” scenarios, with
the help of the computer programs SOFTSUSY, Prospino and SusHi, we received the large values of σ × Br for A
and H bosons at tanβ=2 for the planned 14 TeV at the LHC and found the large σ × Br at tanβ=30 for charged
Higgs boson. The obtained results are of experimental interest as they are connected with the experimental searches
for new physics beyond the Standard Model at the LHC.
PACS: 11.25.-w, 12.60.Jv, 02.10.Ws
1. INTRODUCTION
The searches for supersymmetry (SUSY) are moti-
vated by the solutions of the most important prob-
lems: the hierarchy problem, gauge coupling unifi-
cation and dark matter problem [1]. Experimental
searches for SUSY in the most probable channels for
the superparticle production at the LHC did not lead
to the desired results and set new lower limits in the
mass range about 2 TeV for gluino and squarks [2].
This fact led to the need for SUSY searches in other
sectors, for example, in the electroweak sector. As
highlighted in CERN Courier [3]: ”Based on data
recorded in 2016, CMS has covered models of elec-
troweak production of ”wino”-like charginos and neu-
tralinos with searches in different final states.
More results are expected soon, and the sensitiv-
ity of the searches will largely profit from the exten-
sion of the data set in the remaining two years of
LHC Run 2”. Another important sector for SUSY
searches in low mass range of 1 TeV are the searches
for extended Higgs boson sector predicted by Min-
imal Supersymmetric Standard Model (MSSM) [4],
that consists of five Higgs bosons: CP even Higgs
bosons, h and H, CP odd Higgs boson, A, charged
Higgs bosons, H±.
The purpose of our paper is to calculate the pro-
duction cross section of such particles at the energy
of 14 TeV at the LHC in the most optimal space of
parameters of the MSSM model.
2. OPTIMAL PARAMETER SPACE FOR
STUDYING OF THE PROPERTIES OF
MSSM HIGGS BOSONS
The masses of five Higgs bosons of MSSM model
at tree level are calculated through the masses of
gauge boson, MW , MZ , and two additional parame-
ters such as the pseudoscalar mass, MA and the ratio
of vacuum expectation values of two Higgs doublets,
tanβ ≡ υu/υd [5]:
M2
H± = M2
A +M2
W ,
M2
h,H= 1
2
(
M2
A+M2
Z∓
√
(M2
A+M2
Z)2−4M2
AM2
Zcos22β
)
.
In the paper [6] the theoretical predictions of
the MSSM Higgs particles in the low tanβ regime,
1 ≤tanβ ≤ 3 are reviewed, with the assumption that
SUSY should be in the range of 1 TeV. It was showed
that the heavier MSSM neutral H/A and charged
H± states can decay into gauge bosons, lighter Higgs
bosons and top quarks, presented in Fig.1.
In the Handbook of LHC Higgs cross sections,
2017 [5] are given examples of sensitivity on the
[tanβ, MA] parameter space for the ”model inde-
pendent” hMSSM approach [6], compared to the
second approach [7] so called ”low-tb-high” approach
in the MSSM, that is orthogonal to the one pre-
vious. Relative differences in BR(H→ WW) be-
tween the predictions of the ”low-tb-high” scenario
and the corresponding predictions obtained with the
hMSSM+HDECAY combination are presented in
Fig.2.
∗Corresponding author E-mail address: obikhod@kinr.kiev.ua
ISSN 1562-6016. PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY, 2019, N3(121).
Series: Nuclear Physics Investigations (71), p.3-10.
3
Fig.1. The branching ratios as functions of masses of MSSM Higgs bosons (A left, H center, H± right) for
tanβ=2.5, from [6]
Fig.2. Relative differences in BR(H→WW) between
the hMSSM+HDECAY scenario and the ”low-tb-high”
scenario, from [5]
The results of ATLAS [8] and CMS [9] Collab-
orations excluded at the 95% confidence level (CL)
a significant part of the [tanβ, MA] plane. We’ll
use the benchmark scenarios of the model indepen-
dent approach for the Higgs sector, the hMSSM with
Mh = 125 GeV for the experimental limits on the
cross sections times branching ratios in the context
of the MSSM [10]. The results for the branching frac-
tions received with the program HDECAY [11] for the
Higgs decays in the [tanβ, MA] plane are displayed
in Fig.3 with red area for the large decay rates and
blue area for the small one.
The production cross sections for A and H bosons
are displayed in Fig.4 in the [tanβ, MA] hMSSM pa-
rameter space for 14 TeV at the LHC.
Fig.3. The branching ratios of the neutral Higgs bosons in the [tanβ; MA] parameter space of the hMSSM
model, from [12]
4
Fig.4. The production cross sections of the Higgs bosons A (left) and H (right) at the LHC with
√
s=14 TeV
in the [tanβ; MA] hMSSM plane, from [12]
3. CALCULATIONS OF THE
PRODUCTION CROSS SECTIONS TIMES
BRANCHING FRACTIONS FOR HIGGS
BOSONS
1) CP-even Higgs boson, H.
Searches for heavy Higgs bosons by Run-2 ATLAS
Collaboration at the LHC in the H → ZZ and H →
WW decay channels are relevant due to the possibil-
ity of evidence for new particles beyond the Standard
Model. The limits on σ(pp → H) × BR(H → ZZ)
and σ(pp → H) × BR(H → WW ) at 95% CL from
[13] and [14] correspondingly are presented in Fig.5.
Fig.5. Limits on σ(pp → H) × BR(H → ZZ) (a) and σ(pp → H) × BR(H → WW ) (b) via gluon-gluon
fusion at 95% CL
Using the restricted parameter set for [tanβ; MA]
plane, presented in the previous section and com-
puter programs SusHi [15] and SOFTSUSY4.0 [16],
we calculated σ(pp → H) × BR(H → ZZ) and
σ(pp → H)×BR(H → WW ) for
√
s=14 TeV at the
LHC, presented in Fig.6.
5
Fig.6. σ(pp → H)×BR(H → ZZ) (left) and σ(pp → H)×BR(H → WW ) (right) for
√
s=14 TeV at the
LHC
From Fig.6 we can see the increase in value σ×Br
for ggh fusion process compared with bbh fusion pro-
cess of heavy Higgs boson, H production. Since
the branching ratios for the decays H → bb and
H → tt are significant values according to our calcu-
lations with SOFTSUSY4.0 program, we have per-
formed calculations of σ(pp → H) × BR(H → tt)
and σ(pp → H) × BR(H → bb) for the planned at
the LHC energy of 14 TeV, presented in Fig.7.
Fig.7. σ(pp → H)×BR(H → bb) (left) and σ(pp → H)×BR(H → tt) (right) for
√
s=14 TeV at the LHC
From the comparison of our calculations, pre-
sented above, we can see significant predominance of
the values σ × Br for the second variant (see Fig.7)
compared to the first one (see Fig.6). It is also im-
portant to stress the necessity of N3LO calculations
for essential enlargement of the σ ×Br value.
2) CP-odd Higgs boson, A.
In this section we have considered the following de-
cay processes of A boson: A → bb and A → tt. The
consideration of these processes of A boson decay is
connected with the large value of branching ratio,
that is represented in Fig.1. As we have calculated
the process A → Zh in [17] and currently there are
no other experimental data, for future experimental
searches it was of interest to perform calculations for
the two other decay channels from the three maxi-
mal. Using the computer programs SOFTSUSY4.0
and SusHi, we have performed the calculations of
σ×Br for CP-odd Higgs boson, A. As the branching
ratio for A boson is maximal for the decays A → bb
and A → tt in the selected set of parameters, it was
interesting to calculate σ×Br for this both processes
over a wide range of boson masses, from 500 GeV to
3450 GeV. The results of our calculations are pre-
sented in Fig.8.
6
Fig.8. σ(pp → A)×BR(A → bb) in the mass range 500...2200 GeV (left) and 1800...3450 GeV (right) (a)
and σ(pp → A)×BR(A → tt) in the mass range 500...2200 GeV (left) and 1800...3450 GeV (right) (b)
From Fig.8 we can see the predominance of the
ggh process of A boson formation over the bbh one
except for the (b) case of A → tt process in the mass
range of 500...2200 GeV with interesting intersection
points between bbh and ggh processes. It is also
necessary to stress the largest value of σ × Br for
the smallest masses, mA, what is easily explained in
connection with the lower mass of the Higgs boson
A.
3) charged Higgs bosons, H±.
As is known [18], the production of charged Higgs
boson depends on its mass and for mH+ > mt, H
+
production mode is associated with a top quark, as
illustrated in Fig.9.
Fig.9. Leading-order Feynman diagram for the
production of H+ in association with a top quark in
five flavor scheme
In Fig.10 are shown the expected and observed limits
for the production of H+ → tb in association with
a top quark, bands for 68% (in green) and 95% (in
yellow) confidence intervals and the signal prediction
in the mmod−
h benchmark scenario of the MSSM [19].
Fig.10. Expected and observed limits for the
production o f H+ → tb in association with a top
quark, from [18]
As model points with 0.5 ≤tanβ ≤ 0.6, tanβ ≈
0.5, tanβ=0.7 and tanβ=0.9 are excluded in the H+
mass range of 200...600 GeV obtained also in other
7
scenarios of MSSM, it would be interesting to do the
calculations of σ × Br for tanβ=2. For the study-
ing of properties of charged Higgs bosons, H±, we
have used the set of parameters of MSSM model to
calculate the cross-sections of tH+ production with
the help of the software program PROSPINO [20]
with data implemented from the latest computer pro-
gram SOFTSUSY4.0. The corresponding results for
σ(pp → tH+)BR(H+ → tb), obtained for the param-
eter set of tanβ=2 and for the energy of 14 TeV in the
mass range of mH+=500...1200 GeV are presented in
Fig.11.
Fig.11. σ(pp → tH+)BR(H+ → tb) for 14 TeV at
the LHC in the mass range of
mH+=500...1200 GeV
Another most visible decay channel of a charged
Higgs boson is H+ → τν. Its searches in associa-
tion with a single top quark were performed by AT-
LAS Collaboration at the LHC with proton–proton
collision at
√
s=13 TeV corresponding to an inte-
grated luminosity of 3.2 fb−1. The analysis of ex-
perimental data leads to 95% CL upper limits on the
σ(pp → [b]tH±)BR(H± → τν), between 1.9 pb and
15 fb, for mH+=200...2000 GeV, that is presented in
Fig.12.
Fig.12. Observed and expected 95% CL exclusion
limits for heavy charged Higgs boson production as
a function of mH+ , from [21]
From these experimental data tanβ = 42...60 for
mH+=200 GeV and tanβ=60 for the H+ mass range
from 200 to 340 GeV were excluded. So we have con-
sidered two cases of tanβ=2 and 30 for comparison
of the value of σ(pp → [b]tH±)BR(H± → τν) for
these two cases, presented in Fig.13.
Fig.13. σ(pp → [b]tH±)BR(H± → τν) for (a) tanβ=30 in the mass range m+
H=1200...2650 GeV and (b)
tanβ=2 in the mass range m+
H=2200...4600 GeV with the planned 14 TeV at the LHC
From Fig.13 the predominance in the value of
σ(pp → [b]tH±)BR(H± → τν) for the variant
(a) is obvious but we can see the larger values of
σ(pp → [b]tH±)BR(H± → τν) for tanβ=30 in the
range of the mass intersection of charged Higgs bo-
son, m+
H=2200...2650 GeV for (a) and (b) variants.
In addition, it is known that for mH+ > mt the
dominant decay of H+ is H+ → tb, but for large
values of tanβ is observed a substantial contribution
from H+ → τν [21]. For comparison we calculated
σ(pp → tH+)BR(H+ → tb) for tanβ=30 for 14 TeV
at the LHC, presented in Fig.14.
From the Fig.14 and 13 it can be con-
cluded about the largest values of σ(pp →
tH+)BR(H+ → tb) in contrast with σ(pp →
[b]tH±)BR(H± → τν) for the same tanβ=30, but
8
the increase of the value σ(pp → [b]tH±)BR(H± →
τν) for the larger tanβ was stressed above.
Fig.14. σ(pp → tH+)BR(H+ → tb) for 14 TeV at
the LHC in the mass range of
m+
H=1200...2650 GeV
4. CONCLUSIONS
Using the restricted parameter set of the hMSSM
model, presented in [5] and [12] for the extended
sector of Higgs bosons as well as the latest experi-
mental data on the observed and expected CL ex-
clusion limits for Higgs boson production, performed
by ATLAS Collaboration [13], [14], [18], [21] with the
help of software programs SOFTSUSY4.0, SusHi and
PROSPINO we have calculated σ × Br for CP-even
Higgs boson, H, CP-odd Higgs boson, A and charged
Higgs bosons, H±. From our calculations we can con-
clude about the large values of the σ × Br at small
tanβ=2 for chosen decay channels of Higgs bosons for
the energy at the LHC of 14 TeV. But for the charged
Higgs boson are obtained another results, that are
connected with larger values of tanβ.
References
1. Yuri Shirman. TASI 2008 Lectures: Introduc-
tion to Supersymmetry and Supersymmetry
Breaking // arXiv:0907.0039v1 [hep-ph] 1 Jul
2009.
2. CMS Collaboration. Search for supersymme-
try in multijet events with missing transverse
momentum in proton-proton collisions at 13
TeV // CMS-SUS-16-033, CERN-EP-2017-072,
arXiv:1704.07781 [hep-ex].
3. CMS Collaboration. SUSY searches in the elec-
troweak sector// CERN Courier. 2017, v.57,
N5, p.12.
4. Stephen P.Martin. A Supersymmetry Primer//
arXiv: hep-ph/9709356.
5. LHC Higgs Cross Section Working Group/
D. deFlorian, C.Grojean, F.Maltoni,
C.Mariotti, A.Nikitenko, M.Pieri, P. Savard,
M. Schumacher, R.Tanaka (Eds.). Handbook
of LHC Higgs Cross Sections: 4. Deciphering
the nature of the Higgs sector // CERN Yellow
Reports: Monographs. CERN, Geneva, 2017,
v.2, 869p., CERN-2017-002-M.
6. A.Djouadi and J.Quevillon. The MSSM Higgs
sector at a high MSUSY: reopening the low
tanβ regime and heavy Higgs searches // JHEP.
2013, v.10, p.028, arXiv:1304.1787 [hep-ph].
7. E. Bagnaschi et al. Benchmark scenarios for low
tanβ in the MSSM // LHCHXSWG-2015-002,
2015.
8. The ATLAS collaboration. Search for neutral
Higgs bosons of the minimal supersymmetric
standard model in pp collisions at s = 8 TeV
with the ATLAS detector // JHEP 2014, v.11,
p.056; arXiv:1409.6064 [hep-ex].
9. The CMS collaboration. Search for neutral
MSSM Higgs bosons decaying to a pair of tau
leptons in pp collisions // JHEP 2014, v.10,
p.160, arXiv:1408.3316 [hep-ex].
10. M.Carena, S.Heinemeyer, C.Wagner and
G.Weiglein. Suggestions for Benchmark Scenar-
ios for MSSM Higgs Boson Searches at Hadron
Colliders // Eur. Phys. J. 2003, v.C26, p.601-
607.
11. A.Djouadi, J.Kalinowski and M. Spira. HDE-
CAY: a Program for Higgs Boson Decays in the
Standard Model and its Supersymmetric Exten-
sion // Comput. Phys. Commun. 1998, v.108,
p.56-74;
A.Djouadi, M.Muhlleitner and M. Spira.
Decays of supersymmetric particles: The
Program SUSY-HIT (SUspect-SdecaY-Hdecay-
InTerface) // Acta. Phys. Polon. 2007, v.B38,
p.635-644.
12. A.Djouadi et al. Fully covering the MSSM Higgs
sector at the LHC // arXiv:1502.05653v2 [hep-
ph] 22 Jun 2015.
13. The ATLAS Collaboration. Search for high-
mass resonances decaying into a Z boson pair in
the llνν final state in pp collisions at s=13 TeV
with the ATLAS detector // ATLAS-CONF-
2016-012.
14. The ATLAS Collaboration. Search for a high-
mass Higgs boson decaying to a pair of W
bosons in pp collisions at s=13 TeV with the
ATLAS detector// ATLAS-CONF-2016-021.
15. SusHi can be downloaded from: http: //
sushi.hepforge.org/.
16. B.C.Allanach, T.Cridge. The Calculation of
Sparticle and Higgs Decays in the Minimal
and Next-to-Minimal Supersymmetric Standard
9
Models: SOFTSUSY4.0 // arXiv:1703.09717
[hep-ph].
17. T.V.Obikhod, E.A. Petrenko. The study of
the extended Higgs boson sector within 2HDM
model // arXiv:1703.09776 [hep-ph].
18. ATLAS Collaboration. Search for charged Higgs
bosons in the H± → tb decay channel in pp col-
lisions at s=8 TeV using the ATLAS detector
// JHEP. 2016, v.03, p.127.
19. M.Carena, S.Heinemeyer, O. Stal,
C.E.M.Wagner and G.Weiglein. MSSM
Higgs Boson Searches at the LHC: Benchmark
Scenarios after the Discovery of a Higgs-like
Particle // Eur. Phys. J. 2013, v.C 73, 2552,
arXiv:1302.7033.
20. W.Beenakker, R.Hoepker, M. Spira.
PROSPINO: A Program for the Production of
Supersymmetric Particles in Next-to-leading
Order QCD // arXiv:hep-ph/9611232v1.
21. The ATLAS Collaboration. Search for charged
Higgs bosons produced in association with a top
quark and decaying via H→ τν using pp colli-
sion data recorded at s = 13 TeV by the ATLAS
detector // CERN-PH-2016-056.
ÈÇÓ×ÅÍÈÅ ÑÂÎÉÑÒ ÐÀÑØÈÐÅÍÍÎÃÎ ÑÅÊÒÎÐÀ ÁÎÇÎÍÀ ÕÈÃÃÑÀ
 ÐÀÌÊÀÕ hMSSM-ÌÎÄÅËÈ
Ò.Â.Îáèõîä, Å.À.Ïåòðåíêî
Èñïîëüçóÿ ïîñëåäíèå ýêñïåðèìåíòàëüíûå äàííûå, ïîëó÷åííûå ATLAS êîëëàáîðàöèåé, â ðàìêàõ Ìèíè-
ìàëüíîé ñóïåðñèììåòðè÷íîé ñòàíäàðòíîé ìîäåëè, ìû ïðåäñòàâèëè ðàñ÷åòû ïî ñå÷åíèÿì óìíîæåííûì
íà øèðèíû ðàñïàäîâ, σ×Br, êàê ôóíêöèè ìàññû ÑÐ-÷åòíîãî Í áîçîíà Õèããñà, ÑÐ-íå÷åòíîãî À áîçîíà
Õèããñà è çàðÿæåííîãî, H± áîçîíà Õèããñà. Èñïîëüçîâàíèå îãðàíè÷åííîãî íàáîðà ïàðàìåòðîâ, ïîëó÷åí-
íûõ èç hMSSM + HDECAY è "low-tb-high"ñöåíàðèåâ, ñ ïîìîùüþ êîìïüþòåðíûõ ïðîãðàìì SOFTSUSY,
Prospino è SusHi, äàëî âîçìîæíîñòü ïîëó÷èòü áîëüøèå çíà÷åíèÿ σ×Br äëÿ À è Í áîçîíîâ ïðè tanβ
= 2 äëÿ çàïëàíèðîâàííûõ 14 Òý íà LHC è áîëüøîå çíà÷åíèå σ×Br ïðè tanβ = 30 äëÿ çàðÿæåííîãî
áîçîíà Õèããñà. Ïîëó÷åííûå ðåçóëüòàòû ïðåäñòàâëÿþò ñîáîé èíòåðåñ äëÿ ýêñïåðèìåíòà, ïîñêîëüêó îíè
ñâÿçàíû ñ ýêñïåðèìåíòàëüíûìè ïîèñêàìè íîâîé ôèçèêè çà ïðåäåëàìè Ñòàíäàðòíîé ìîäåëè íà LHC.
ÂÈÂ×ÅÍÍß ÂËÀÑÒÈÂÎÑÒÅÉ ÐÎÇØÈÐÅÍÎÃÎ ÑÅÊÒÎÐÀ ÁÎÇÎÍÀ ÕIÃÃÑÀ
 ÐÀÌÊÀÕ hMSSM-ÌÎÄÅËI
Ò.Â.Îáiõîä, �.Î.Ïåòðåíêî
Âèêîðèñòîâóþ÷è îñòàííi åêñïåðèìåíòàëüíi äàíi, îòðèìàíi ATLAS êîëàáîðàöi¹þ, ó ðàìêàõ Ìiíiìàëüíî¨
ñóïåðñèìåòðè÷íî¨ ñòàíäàðòíî¨ ìîäåëi, ìè ïðåäñòàâèëè ðîçðàõóíêè ïî ïåðåðiçàì óòâîðåííÿ ïîìíîæåíèì
íà øèðèíè ðîçïàäiâ, σ×Br, ÿê ôóíêöi¨ ìàñè ÑÐ-ïàðíîãî Í áîçîíà Õiããñà, ÑÐ-íåïàðíîãî À áîçîíà Õiããñà
i çàðÿäæåíîãîH± áîçîíà Õiããñà. Âèêîðèñòàííÿ îáìåæåíîãî íàáîðó ïàðàìåòðiâ, îòðèìàíîãî ç hMSSM +
HDECAY i "low-tb-high"ñöåíàði¨â, çà äîïîìîãîþ êîìï'þòåðíèõ ïðîãðàì SOFTSUSY, Prospino i SusHi,
äàëî ìîæëèâiñòü îòðèìàòè âåëèêi çíà÷åííÿ σ×Br çàäëÿ À i Í áîçîíiâ ïðè tanβ = 2 äëÿ çàïëàíîâà-
íèõ 14 Òå íà LHC i âåëèêå çíà÷åííÿ σ×Br ïðè tanβ = 30 äëÿ çàðÿäæåíîãî áîçîíà Õiããñà. Îòðèìàíi
ðåçóëüòàòè ¹ âàæëèâèìè äëÿ åêñïåðèìåíòà, îñêiëüêè âîíè ïîâ'ÿçàíi iç åêñïåðèìåíòàëüíèìè ïîøóêàìè
íîâî¨ ôiçèêè çà ìåæàìè Ñòàíäàðòíî¨ ìîäåëi íà LHC.
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