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1.Introduction
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InChapter4analysesrelatedtotheforwardjetsproductionarepresented.Atfirstaninclusive
forwardjetsproductioncrosssectionmeasurementisshown.Thenananalysisthatislookingat
correlationsbetweenjetsproducedintheforwardandinthecentralpseudorapiditiesisdescribed.
Next,anobservablerelatedtoanactivityin-betweenofthedijetpairproducedwithalargepseudo-
rapidityseparationispresented.Finally,ananalysisofazimuthalanglecorrelationsbetweenpairsof
jetsemittedintheforwardandbackwarddirections(Mueller–Naveletdijets)isfeatured.Themain
goaloftheseanalysesistostudyQCDeffectsatlow-x,especiallyeffectscorrespondingtotheQCD
evolutionintheregimedescribedbytheBalitsky–Fadin–Kuraev–Lipatovequations.
Thefifthchapterisdedicatedtoanalysesofdiffractiveevents.Eventswithsoftdiffractive
interactionsareselectedwithademandonapresenceofalargerapiditygapproducedbyacolorless
pomeronexchange.Thecrosssectionforproductionofvariousclassesofeventswithagapare
calculatedandcomparedtothepredictionsofsoftdiffractionmodels.Then,aharddiffractionis
studiedineventswithagapaccompanyingaproductionofhigh-pTdijetsorW/Zbosons.Aspecial
attentionispaidtodijeteventswitharapiditygapin-betweenthejets(jet-gap-jettopology).It
isdemonstratedthatapropermodellingofobservablesinthoseeventsrequiresanintroductionof
effectsdescribedwiththeBalitsky–Fadin–Kuraev–Lipatovevolutionequations.Thiscouldbethe
firstobservationoftheBFKLeffectsattheLargeHadronColliderexperiments.
InChapter6interactionsleadingtoanexclusivecentralproductionofvariousstatesaredis-
cussed.NotonlyQCDprocesses(pomeron–pomeron)butalsopureQEDprocesses(photon–photon)
areresponsiblefortheexclusiveproduction.Thefollowingfinalexclusivestatesareanalyzed:p+p1,
e+e1,77,π+π1andW+W1.Thelastoftheseisespeciallyinterestingasitleadstothemost
stringentexperimentallimitfortheanomalousquarticgaugecouplingconstant.
ThelastchaptersummarizestheforwardphysicsresultsobtainedbytheCMSCollaboration
withtheproton–protoncollisionsdatafromRun1.
