TY - JOUR

T1 - Intermediate scalars and the effective string model of black holes

AU - Klebanov, Igor R.

AU - Rajaraman, Arvind

AU - Tseytlin, Arkady A.

N1 - Funding Information:
We are grateful to J. Maldacena for useful discussions. The work of I.R.K. was supported in part by DOE grant DE-FG02-91ER40671, the NSF Presidential Young Investigator Award PHY-9157482, and the James S. McDonnell Foundation grant No. 91-48. The work of A.R. was supported in part by the Department of Energy under contract no. DE-AC03-76SF00515. A.A.T. is grateful to the Institute of Theoretical Physics of SUNY at Stony Brook for hospitality during the final stage of this work and acknowledges also the support of PPARC and the European Commission TMR programme grant ERBFMRX-CT96-0045.

PY - 1997/10/13

Y1 - 1997/10/13

N2 - We consider five-dimensional black holes modeled by D-strings bound to D5-branes, with momentum along the D-strings. We study the greybody factors for the non-minimally coupled scalars which originate from the gravitons and R-R antisymmetric tensor particles polarized along the 5-brane, with one index along the string and the other transverse to the string. These scalars, which we call intermediate, couple to the black holes differently from the minimal and the fixed scalars which were studied previously. Analysis of their fluctuations around the black hole reveals a surprising mixing between these NS-NS and R-R scalars. We disentangle this mixing and obtain two decoupled scalar equations. These equations have some new features, and we are able to calculate the greybody factors only in certain limits. The results agree with corresponding calculations in the effective string model provided one of the intermediate scalars couples to an operator of dimension (1,2), while the other to an operator of dimension (2,1). Thus, the intermediate scalars are sensitive probes of the chiral operators in the effective string action.

AB - We consider five-dimensional black holes modeled by D-strings bound to D5-branes, with momentum along the D-strings. We study the greybody factors for the non-minimally coupled scalars which originate from the gravitons and R-R antisymmetric tensor particles polarized along the 5-brane, with one index along the string and the other transverse to the string. These scalars, which we call intermediate, couple to the black holes differently from the minimal and the fixed scalars which were studied previously. Analysis of their fluctuations around the black hole reveals a surprising mixing between these NS-NS and R-R scalars. We disentangle this mixing and obtain two decoupled scalar equations. These equations have some new features, and we are able to calculate the greybody factors only in certain limits. The results agree with corresponding calculations in the effective string model provided one of the intermediate scalars couples to an operator of dimension (1,2), while the other to an operator of dimension (2,1). Thus, the intermediate scalars are sensitive probes of the chiral operators in the effective string action.

KW - Black-hole radiation

KW - Effective string model

KW - Higher-dimensional supergravity

KW - Non-minimally coupled scalars

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U2 - 10.1016/S0550-3213(97)00415-X

DO - 10.1016/S0550-3213(97)00415-X

M3 - Article

AN - SCOPUS:0031566654

VL - 503

SP - 157

EP - 176

JO - Nuclear Physics B

JF - Nuclear Physics B

SN - 0550-3213

IS - 1-2

ER -