TY - JOUR

T1 - Discrete quantum hair on black holes and the non-abelian Aharonov-Bohm effect

AU - Alford, M. G.

AU - March-Russell, John

AU - Wilczek, Frank

N1 - Funding Information:
This work was partially supported by NSF grant PHY-87-14654 and DOE contract DE-ACO2-76ER02220. We thank Sidney Coleman for helpful discussions.

PY - 1990/6/25

Y1 - 1990/6/25

N2 - In an abelian Higgs model where U(1) is broken to Zp by a condensate of charge pe, the U(1) charge QV in a finite volume V is an observable, but charge is screened, so 〈 QV 〉 falls exponentially to zero as V → ∞. It is demonstrated that the Zp charge, QV modulo pe, can be cast as a surface integral by evaluating exp( 2πiQV pe) in states containing a shell of unbroken vacuum around the volume, and its value is unaffected by the presence of the condensate inside the shell. Thus in these states QV modulo pe is not screened. This shows that black holes can indeed have Zp hair. The extension to a non-abelian discrete gauge charge is discussed, and the detection of this charge by its non-abelian Aharonov-Bohm interaction with cosmic strings is described.

AB - In an abelian Higgs model where U(1) is broken to Zp by a condensate of charge pe, the U(1) charge QV in a finite volume V is an observable, but charge is screened, so 〈 QV 〉 falls exponentially to zero as V → ∞. It is demonstrated that the Zp charge, QV modulo pe, can be cast as a surface integral by evaluating exp( 2πiQV pe) in states containing a shell of unbroken vacuum around the volume, and its value is unaffected by the presence of the condensate inside the shell. Thus in these states QV modulo pe is not screened. This shows that black holes can indeed have Zp hair. The extension to a non-abelian discrete gauge charge is discussed, and the detection of this charge by its non-abelian Aharonov-Bohm interaction with cosmic strings is described.

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U2 - 10.1016/0550-3213(90)90512-C

DO - 10.1016/0550-3213(90)90512-C

M3 - Article

AN - SCOPUS:0000573031

VL - 337

SP - 695

EP - 708

JO - Nuclear Physics B

JF - Nuclear Physics B

SN - 0550-3213

IS - 3

ER -