2026/01/16 by CMS Collaboration, A. Hayrapetyan, V. Makarenko +98 · 2 voices
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ex
paper · pdf · doi:10.1103/2m87-3dlr
openalex publication_date 2026/03/13 · openalex created_date 2026/03/14 · openalex updated_date 2026/07/28
A search for dark matter particles produced in association with a Higgs boson decaying to a bottom quark-antiquark pair in proton-proton collisions at <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:msqrt> <a:mrow> <a:mi>s</a:mi> </a:mrow> </a:msqrt> <a:mo>=</a:mo> <a:mn>13</a:mn> <a:mtext> </a:mtext> <a:mtext> </a:mtext> <a:mi>TeV</a:mi> </a:mrow> </a:math> is presented. The data, collected with the CMS detector at the LHC, correspond to an integrated luminosity of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:mrow> <c:mn>101</c:mn> <c:mtext> </c:mtext> <c:mtext> </c:mtext> <c:msup> <c:mrow> <c:mi>fb</c:mi> </c:mrow> <c:mrow> <c:mo>−</c:mo> <c:mn>1</c:mn> </c:mrow> </c:msup> </c:mrow> </c:math> . The analysis is performed in exclusive categories targeting both Lorentz-boosted (merged) and resolved <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:mi>b</e:mi> </e:math> jet pair topologies, covering a wide range of Higgs boson transverse momentum. A statistical combination is made with a previous search using data collected in 2016 and corresponding to an integrated luminosity of <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:mrow> <g:mn>35.9</g:mn> <g:mtext> </g:mtext> <g:mtext> </g:mtext> <g:msup> <g:mrow> <g:mi>fb</g:mi> </g:mrow> <g:mrow> <g:mo>−</g:mo> <g:mn>1</g:mn> </g:mrow> </g:msup> </g:mrow> </g:math> . The observed data agree with the standard model background predictions. Constraints are placed on models predicting new particles or interactions, such as those in the simplified frameworks of baryonic- <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"> <i:mrow> <i:msup> <i:mrow> <i:mi>Z</i:mi> </i:mrow> <i:mrow> <i:mo>′</i:mo> </i:mrow> </i:msup> </i:mrow> </i:math> and <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"> <k:mrow> <k:mn>2</k:mn> <k:mi>HDM</k:mi> <k:mo>+</k:mo> <k:mi>a</k:mi> </k:mrow> </k:math> , where the latter is a type-II two-Higgs-doublet model featuring a heavy pseudoscalar with an additional light pseudoscalar. Upper limits at 95% confidence level are set on the production cross section for these models. For the baryonic- <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline"> <m:mrow> <m:msup> <m:mrow> <m:mi>Z</m:mi> </m:mrow> <m:mrow> <m:mo>′</m:mo> </m:mrow> </m:msup> </m:mrow> </m:math> model, <o:math xmlns:o="http://www.w3.org/1998/Math/MathML" display="inline"> <o:mrow> <o:msup> <o:mrow> <o:mi>Z</o:mi> </o:mrow> <o:mrow> <o:mo>′</o:mo> </o:mrow> </o:msup> </o:mrow> </o:math> boson masses below 2.25 TeV are excluded for a dark matter particle candidate mass of 1 GeV. In the <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"> <q:mrow> <q:mn>2</q:mn> <q:mi>HDM</q:mi> <q:mo>+</q:mo> <q:mi>a</q:mi> </q:mrow> </q:math> model, heavy pseudoscalar masses between 850 and 1300 GeV are excluded for a light pseudoscalar mass of 350 GeV.