Monte Carlo Generators of Black Holes at LHCgrid.kfki.hu/twiki/pub/CMS/WeeklyBudapestDebrecenMeetings/20100… · Monte Carlo Generators of Black Holes at LHC Enikı Regıs. Search

Monte Carlo Generators of Black Monte Carlo Generators of Black Holes at LHCHoles at LHC

Enikı RegısEnikı Regıs

Search for Extra DimensionsSearch for Extra Dimensions

�� LHC : Quantum Gravity & Extra DimsLHC : Quantum Gravity & Extra Dims

�� Stringy Quantum Black HolesStringy Quantum Black Holes

�� LowLow--scale Gravity Black Holes at LHCscale Gravity Black Holes at LHC

�� Comparison of Black Hole GeneratorsComparison of Black Hole Generators

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De Roeck Gamsizkan TrocsanyiDe Roeck Gamsizkan Trocsanyi

Black holes at LHCBlack holes at LHC

�� Event generator for ED BHs : BlackMax IEvent generator for ED BHs : BlackMax I--IIII

�� Rotation, fermion splitting, brane tensionRotation, fermion splitting, brane tension

�� Experimental signatures, particle decayExperimental signatures, particle decay

�� CMSSW analysisCMSSW analysis

�� Comparison with Charybdis IComparison with Charybdis I--IIII

�� TRUENOIR, CATFISH : no rotationTRUENOIR, CATFISH : no rotation

�� Energy lossEnergy loss

Black Hole Mass functionBlack Hole Mass function

�� Log Log ΦΦ ~ M ~ M -- M_minM_min

for various models of for various models of

Planck mass, ED, M_min,Planck mass, ED, M_min,

rotation, brane tensionrotation, brane tension

BlackMax & Charybdis agreeBlackMax & Charybdis agree

on initial mass distributionon initial mass distribution

as not affected by mass lossas not affected by mass loss

Lepton transverse momentum : models Lepton transverse momentum : models

�� Planck massPlanck mass : 2, 2, 5 TeV: 2, 2, 5 TeV

�� Extra dimensions:Extra dimensions: 5, 3, 3 ( > 2 )5, 3, 3 ( > 2 )

�� Center of mass energy: 14 TeVCenter of mass energy: 14 TeV

Minimum black hole mass : Minimum black hole mass : 4, 5, 7 TeV4, 5, 7 TeV

Multiplicity decreases with Planck massMultiplicity decreases with Planck mass

(fermions dominate)(fermions dominate)

Energy and momentum increaseEnergy and momentum increase

Model comparisonsModel comparisons

Analysis at CMSAnalysis at CMS

�� Missing Transverse Energy : Missing Transverse Energy :

graviton + neutrino : model dependentgraviton + neutrino : model dependent

�� Lepton transverse momentum :Lepton transverse momentum :

easy to identify, cuts off for Standard easy to identify, cuts off for Standard ModelModel

Combined cuts : Combined cuts : ήή , p_T distribution, p_T distribution

Model settings for detector which have Model settings for detector which have different signaturedifferent signature

�� Implementation of generators in CMSSWImplementation of generators in CMSSW

�� Interface BlackMax IIInterface BlackMax II

�� CMSSW : signal and SM backgroundCMSSW : signal and SM background

�� Model with 4TeV minimum black hole mass Model with 4TeV minimum black hole mass experimentally most accessibleexperimentally most accessible

Comparison of BlackMax with Charybdis Comparison of BlackMax with Charybdis for nonfor non--rotating black holesrotating black holes

�� BlackMax has higher multiplicity & BlackMax has higher multiplicity &

lower momentalower momenta

�� Missing Transverse Energy : Missing Transverse Energy :

gravitons only in BlackMax (black curves)gravitons only in BlackMax (black curves)

BlackMaxBlackMax--II : gravitons in final burst tooII : gravitons in final burst too

Higher METHigher MET

Apart from cross sections good agreementApart from cross sections good agreement

Yoshino Yoshino –– Rychkov suppression decreases Rychkov suppression decreases σσ

Multiplicity in BlackMax & CharybdisMultiplicity in BlackMax & Charybdis

Transverse momentum of emitted electronsTransverse momentum of emitted electrons

Transverse momentum of all particlesTransverse momentum of all particles

Spectrum of emitted electronsSpectrum of emitted electrons

Spectrum of emitted particlesSpectrum of emitted particles

Pseudorapidity of electronsPseudorapidity of electrons

Pseudorapidity of emitted particlesPseudorapidity of emitted particles

Missing Transverse Energy with GravitonsMissing Transverse Energy with Gravitons

Rotating Black Holes : Rotating Black Holes : Compare BlackMax II with Charybdis IICompare BlackMax II with Charybdis II

�� BHs carry spin from impact parameterBHs carry spin from impact parameter

�� Spin : fewer, more energetic particlesSpin : fewer, more energetic particles

�� Enhanced vector emission: more gluons, Enhanced vector emission: more gluons, photons, W, Zphotons, W, Z

�� Particle spectra, angular distributions, Particle spectra, angular distributions, multiplicities strongly affected by BH spinmultiplicities strongly affected by BH spin

In rotating D>5 graviton emission unknownIn rotating D>5 graviton emission unknown

Multiplicities for Rotating Black HolesMultiplicities for Rotating Black Holes

Transverse momentum of all particles for rotationTransverse momentum of all particles for rotation

Transverse momentum of electrons for rotationTransverse momentum of electrons for rotation

Pseudorapidity of all particles for rotationPseudorapidity of all particles for rotation

Pseudorapidity of electrons for rotationPseudorapidity of electrons for rotation

Missing Transverse Energy with rotationMissing Transverse Energy with rotation

Transverse momentum of all particles : Transverse momentum of all particles :

rotating black hole with Yoshino rotating black hole with Yoshino -- RychkovRychkov

Transverse momentum of electrons : Transverse momentum of electrons : rotating with Yoshino rotating with Yoshino -- Rychkov suppressionRychkov suppression

Multiplicities for rotation, Yoshino Multiplicities for rotation, Yoshino -- RychkovRychkov

MET with rotation, Yoshino MET with rotation, Yoshino -- RychkovRychkov

Thank you for your attention !Thank you for your attention !