Abstract
A search is presented for massive narrow-width resonances in the mass range of 1–4.5
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
, decaying into pairs of Higgs bosons (HH). The search uses proton–proton collision data at a center-of-mass energy of 13
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
collected with the CMS detector at the CERN LHC during 2016–2018, corresponding to an integrated luminosity of 138
$$\,\text {fb}^{-1}$$
fb
-
1
. The analysis targets final states where one Higgs boson decays into a pair of bottom quarks and the other into a pair of tau leptons,
$$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\,\tau ^{+}\tau ^{-}$$
X
→
HH
→
b
b
¯
τ
+
τ
-
. It uses a single large radius jet to reconstruct the
$$\text {H}\rightarrow \text {b}\bar{\text {b}}$$
H
→
b
b
¯
decay, while the
$$\text {H}\rightarrow \tau ^{+}\tau ^{-}$$
H
→
τ
+
τ
-
decay products can either be contained within a single large radius jet or appear as two isolated tau leptons. The observed data are consistent with standard model background expectations. Upper limits at 95% confidence level are set on the production cross section for resonant HHproduction for masses between 1 and 4.5
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
. This analysis sets the most sensitive limits to date on
$$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\, \tau ^{+}\tau ^{-}$$
X
→
HH
→
b
b
¯
τ
+
τ
-
decays in the mass range of 1.4–4.5
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
.
