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SUMMARY:Strange particles femtoscopy in PbPb collisions with CMS detector
DTSTART;VALUE=DATE-TIME:20221117T062000Z
DTEND;VALUE=DATE-TIME:20221117T064000Z
DTSTAMP;VALUE=DATE-TIME:20260721T011525Z
UID:indico-contribution-82-706@events.vecc.gov.in
DESCRIPTION:Speakers: Raghunath Pradhan (Indian Institute of Technology Ma
 dras (IN))\nThe two-particle correlations as a function of relative moment
 a of identified hadrons involving $\\mathrm{K^{0}_{S}}$ and $\\Lambda/\\ba
 r{\\Lambda}$ are measured in PbPb collision at $\\sqrt{s_{_{\\mathrm{NN}}}
 } =$ 5.02 TeV with the data samples collected by the CMS experiment at the
  LHC. Such correlations are sensitive to quantum statistics and possible f
 inal state interactions between the particles. The shape of the correlatio
 n function is observed to vary largely for different particle pairs\, reve
 aling the effect of the strong final state interaction in each case. The s
 ource radii are extracted from $\\mathrm{K^{0}_{S}K^{0}_{S}}$ correlations
  in different centrality regions and found to decrease from central to per
 ipheral collisions. The strong interaction scattering parameters are extra
 cted from $\\mathrm{K^{0}_{S}K^{0}_{S}}$\, $\\Lambda\\mathrm{K^{0}_{S}}\\o
 plus\\bar{\\Lambda}\\mathrm{K^{0}_{S}}$\, $\\Lambda\\Lambda\\oplus\\bar{\\
 Lambda}\\bar{\\Lambda}$ and $\\Lambda\\bar{\\Lambda}$ correlations using t
 he Lednicky-Lyuboshits model\, and compared with other experimental and th
 eoretical results. The scattering parameters indicate that the $\\Lambda\\
 Lambda\\oplus\\bar{\\Lambda}\\bar{\\Lambda}$ is attractive and that the $\
 \Lambda\\mathrm{K^{0}_{S}}\\oplus\\bar{\\Lambda}\\mathrm{K^{0}_{S}}$ inter
 action is repulsive.\n\nhttps://events.vecc.gov.in/event/18/contributions/
 706/
LOCATION:Ajay Divatia Lecture Hall\, VECC
URL:https://events.vecc.gov.in/event/18/contributions/706/
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SUMMARY:Constraining the initial baryon profile from baryon and  anti-bary
 on directed flow split
DTSTART;VALUE=DATE-TIME:20221117T060000Z
DTEND;VALUE=DATE-TIME:20221117T062000Z
DTSTAMP;VALUE=DATE-TIME:20260721T011525Z
UID:indico-contribution-82-731@events.vecc.gov.in
DESCRIPTION:Speakers: Tribhuban Parida (IISER Berhampur)\nThe origin of ra
 pidity odd directed flow($v_1$) has been understood as a response of the a
 symmetric distribution of energy and net-baryon density present in the med
 ium at the initial stages of heavy ion collisions. So\, the observed split
 ting of directed flow between baryon and anti-baryon in RHIC BES could be 
 a useful observable to constrain the initial net-baryon profile by model t
 o data comparison. This in turn can enhance our understanding about the me
 chanism of baryon stopping. In this context\, we have proposed an initial 
 condition model of net-baryon and matter deposition which is taken as an i
 nput for a multi stage hybrid framework of hydrodynamics evolution and lat
 e stage hadronic interaction. In the model calculations we are able to des
 cribe the measured splitting of directed flow between baryons($p\,\\Lambda
 $) and anti-baryons($\\bar{p}\, \\bar{\\Lambda}$) along with $v_1$ of meso
 ns like $\\pi^{\\pm}\, K^{\\pm}$ and $\\phi$. Even though we have not cons
 idered the evolution of other two conserved charges(corresponding to stran
 geness and electric charge) in our model\, still the splitting of $v_1$ be
 tween strange and anti-strange particles have been observed at lower colli
 sion energies. This effect has been attributed to the employed equation of
  state which possesses the constraints of strangeness neutrality($n_S=0$) 
 and net electric charge density $n_Q=0.4 n_B$. We will systematically pres
 ent the model calculations of rapidity\, centrality and $p_T$ dependency o
 f measured identified or charged particle's $v_1$ at $\\sqrt{s_{NN}} = $ 7
 .7 GeV to 200 GeV and compare those with experimental data. With the obser
 vations from our model calculations\, we will explicitly demonstrate the i
 mportance to include the conserved charges evolution along with energy den
 sity in hydrodynamics simulations of heavy ion collisions.\n\nhttps://even
 ts.vecc.gov.in/event/18/contributions/731/
LOCATION:Ajay Divatia Lecture Hall\, VECC
URL:https://events.vecc.gov.in/event/18/contributions/731/
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