Mixing It Up:

Horner, Bruce

doi:10.2307/j.ctt46nws6.17

Cited by 6 publications

(13 citation statements)

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“…To correct for this, an average amount of energy, E HC (η, p T ) , was subtracted from all the grid cells whose coordinates in (η, φ)-space matched the direction in which a primary track was initially pointing. In order to calculate E HC (η, p T ) for each primary track, 10 000 events each were simulated for seven different particle momenta and six different η-directions, where a single charged pion was detected in both the TPC and the EMCal [29]. Fig.…”

Section: Hadron Correctionmentioning

confidence: 99%

Jet study in ultra-relativistic heavy-ion collisions with the ALICE detector at the LHC

Blyth¹

2004

J. Phys. G: Nucl. Part. Phys.

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In ultra-relativistic heavy-ion collisions at √ s N N = 5.5 TeV at the ALICE experiment at the LHC, interactions between the high-p T partons and the hot, dense medium produced in the collisions, are expected to lead to jet energy loss (jet-quenching) resulting in changes in the jet fragmentation functions as compared to the unquenched case. In order to reconstruct jet fragmentation functions, accurate information on the jet energy, direction and momentum distribution of the jet particles is needed. This thesis presents first results on jet reconstruction in simulated Pb+Pb collisions using the ALICE detectors and a UA1-based cone jet finding algorithm which has been modified and optimised to reconstruct high-p T jets on an event-by-event basis. Optimisation of the algorithm parameters and methods used to suppress the large background energy contribution while maximising the algorithm efficiency, are discussed and the resulting jet energy and direction resolutions are presented. Accurate jet reconstruction will allow measurement of the jet fragmentation functions and consequently the degree of quenching and therefore provide insight on the properties of the hot and dense medium (for example the initial gluon density) created in the collisions.Publications and presentations on this work include:1. S-L Blyth, Jet study in ultra-relativistic heavy-ion collisions with the ALICE detector at the LHC.

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Section: Hadron Correctionmentioning

confidence: 99%

Jet study in ultra-relativistic heavy-ion collisions with the ALICE detector at the LHC

Blyth¹

2004

J. Phys. G: Nucl. Part. Phys.

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“…(1) diverges for a Lennard-Jones interaction we have replaced V(r) by a Brueckner scattering matrix. 9 This procedure is debatable since certain correlations are counted twice, but it should be reliable enough for the present purpose. Numerical solutions were found for a crystal of 432 particles 10 at four densities.…”

Section: (Vir 1 )) = (Idetr^/ti 3 )^2 Jd 3 Rv(r)mentioning

confidence: 99%

Anharmonic Phonons and Lattice Specific Heat in bccHe3

Horner¹

1970

Phys. Rev. Lett.

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The phonon spectrum of bcc 3 He has been calculated including the leading anharmonic corrections to the self-consistent harmonic approximation. For small wave vectors an anomalous dispersion is found causing a maximum in ^(T) in agreement with experiments .Heat-capacity, 1 ' 2 strain-gauge, 3 and thermalconductivity 4 measurements indicate that B D 0O for 3 He increases for T ^ 0.5 K, goes through a maximum, and shows the usual decrease only for T >0 o 5 K. Varma 5 suggested that this anomaly might be the result of a T ~2 contribution to C v caused by a phonon-induced four-spin interaction. In Ref. 3, however, any such contribution was subtracted but the anomaly persisted, indicating that it might be due to the lattice only. 6 We have calculated the phonon spectrum of bcc 3 He, including the leading correction 7 to the selfconsistent harmonic approximation. 8 This term is almost identical to the expression, quadratic in the third-order coupling parameters, known from standard anharmonic perturbation theory. Only the third-order coupling parameters are replaced by the third derivatives of the averaged potential, (ViR 1 )) = (Idetr^/Ti 3 )^2 Jd 3 rV(r)xexp[-S«a^aa , (^«-^a < )(ra-/2B < )], (D where the tensor r % is the inverse of the static displacement correlation function. Since Eq. (1) diverges for a Lennard-Jones interaction we have replaced V(r) by a Brueckner scattering matrix. 9 This procedure is debatable since certain correlations are counted twice, but it should be reliable enough for the present -40

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“…The behaviour of X(t + t w , t w ) for 1 ≪ t ≪ τ p and τ p ≪ t ≪ τ a , respectively, is also ruled by power laws, as indicated in the lower part of Fig.13. The resulting exponents fulfil [43,45] …”

Section: Off Equilibrium Dynamics and Aging In The Qfdtphasementioning

confidence: 97%

“…(66) with τ a (t w ) ∼ t µ w is obtained from h(t) = e (t η −1) c/η with η = 1 − µ. The numerical solutions [45] indicate η > 0, but the longest time investigated is not long enough, to decide on the actual value of η.…”

Section: Off Equilibrium Dynamics and Aging In The Qfdtphasementioning

confidence: 99%

“…Fig.15 shows correlation-function c(t+ t w , t w ) = q(t + t w , t w ) − m(t + t w ) m(t w ) and FDT-violation parameter X(t + t w , t w ) Figure 15: Correlation function c(t + t w , t w ) = q(t + t w , t w ) − m(t + t w ) m(t w ) and FDT-violation parameter X(t + t w , t w ) for T = 0.5, h = 0.5 (A-phase) and h = 0.7 (B-phase) [45] corresponding to point a and b in Fig.14. The curves are plotted for fixed t + t w .…”

Section: Off Equilibrium Dynamics and Aging In The Bphasementioning

confidence: 99%

See 1 more Smart Citation

Glassy Dynamics and Aging in Disordered Systems

Horner

Collective Dynamics of Nonlinear and Disordered Systems

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Mixing It Up:

Cited by 6 publications

References 0 publications

Jet study in ultra-relativistic heavy-ion collisions with the ALICE detector at the LHC

Jet study in ultra-relativistic heavy-ion collisions with the ALICE detector at the LHC

Anharmonic Phonons and Lattice Specific Heat in bccHe3

Glassy Dynamics and Aging in Disordered Systems

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